diff --git a/prism/config.yml b/prism/config.yml
index d3b6b08709c492..7bbe88e6b4fa71 100644
--- a/prism/config.yml
+++ b/prism/config.yml
@@ -368,8 +368,8 @@ flags:
     comment: Flags for integer nodes that correspond to the base of the integer.
   - name: KeywordHashNodeFlags
     values:
-      - name: STATIC_KEYS
-        comment: "a keyword hash which only has `AssocNode` elements all with static literal keys, which means the elements can be treated as keyword arguments"
+      - name: SYMBOL_KEYS
+        comment: "a keyword hash which only has `AssocNode` elements all with symbol keys, which means the elements can be treated as keyword arguments"
     comment: Flags for keyword hash nodes.
   - name: LoopFlags
     values:
diff --git a/prism/diagnostic.c b/prism/diagnostic.c
index 1fc8c50cb51e39..fd5dce5a04ce0c 100644
--- a/prism/diagnostic.c
+++ b/prism/diagnostic.c
@@ -62,6 +62,7 @@ static const char* const diagnostic_messages[PM_DIAGNOSTIC_ID_LEN] = {
     [PM_ERR_ARGUMENT_FORMAL_GLOBAL]             = "invalid formal argument; formal argument cannot be a global variable",
     [PM_ERR_ARGUMENT_FORMAL_IVAR]               = "invalid formal argument; formal argument cannot be an instance variable",
     [PM_ERR_ARGUMENT_FORWARDING_UNBOUND]        = "unexpected `...` in an non-parenthesized call",
+    [PM_ERR_ARGUMENT_IN]                        = "unexpected `in` keyword in arguments",
     [PM_ERR_ARGUMENT_NO_FORWARDING_AMP]         = "unexpected `&` when the parent method is not forwarding",
     [PM_ERR_ARGUMENT_NO_FORWARDING_ELLIPSES]    = "unexpected `...` when the parent method is not forwarding",
     [PM_ERR_ARGUMENT_NO_FORWARDING_STAR]        = "unexpected `*` when the parent method is not forwarding",
@@ -191,6 +192,7 @@ static const char* const diagnostic_messages[PM_DIAGNOSTIC_ID_LEN] = {
     [PM_ERR_MODULE_TERM]                        = "expected an `end` to close the `module` statement",
     [PM_ERR_MULTI_ASSIGN_MULTI_SPLATS]          = "multiple splats in multiple assignment",
     [PM_ERR_NOT_EXPRESSION]                     = "expected an expression after `not`",
+    [PM_ERR_NO_LOCAL_VARIABLE]                  = "%.*s: no such local variable",
     [PM_ERR_NUMBER_LITERAL_UNDERSCORE]          = "number literal ending with a `_`",
     [PM_ERR_NUMBERED_PARAMETER_NOT_ALLOWED]     = "numbered parameters are not allowed when an ordinary parameter is defined",
     [PM_ERR_NUMBERED_PARAMETER_OUTER_SCOPE]     = "numbered parameter is already used in outer scope",
diff --git a/prism/diagnostic.h b/prism/diagnostic.h
index fc1f0c2b4bb23a..08a3284abff299 100644
--- a/prism/diagnostic.h
+++ b/prism/diagnostic.h
@@ -53,6 +53,7 @@ typedef enum {
     PM_ERR_ARGUMENT_FORMAL_GLOBAL,
     PM_ERR_ARGUMENT_FORMAL_IVAR,
     PM_ERR_ARGUMENT_FORWARDING_UNBOUND,
+    PM_ERR_ARGUMENT_IN,
     PM_ERR_ARGUMENT_NO_FORWARDING_AMP,
     PM_ERR_ARGUMENT_NO_FORWARDING_ELLIPSES,
     PM_ERR_ARGUMENT_NO_FORWARDING_STAR,
@@ -183,6 +184,7 @@ typedef enum {
     PM_ERR_MODULE_TERM,
     PM_ERR_MULTI_ASSIGN_MULTI_SPLATS,
     PM_ERR_NOT_EXPRESSION,
+    PM_ERR_NO_LOCAL_VARIABLE,
     PM_ERR_NUMBER_LITERAL_UNDERSCORE,
     PM_ERR_NUMBERED_PARAMETER_NOT_ALLOWED,
     PM_ERR_NUMBERED_PARAMETER_OUTER_SCOPE,
diff --git a/prism/parser.h b/prism/parser.h
index 7f26054f099bc9..2c58131b1966e8 100644
--- a/prism/parser.h
+++ b/prism/parser.h
@@ -17,12 +17,6 @@
 
 #include <stdbool.h>
 
-// TODO: remove this by renaming the original flag
-/**
- * Temporary alias for the PM_NODE_FLAG_STATIC_KEYS flag.
- */
-#define PM_KEYWORD_HASH_NODE_FLAGS_SYMBOL_KEYS PM_KEYWORD_HASH_NODE_FLAGS_STATIC_KEYS
-
 /**
  * This enum provides various bits that represent different kinds of states that
  * the lexer can track. This is used to determine which kind of token to return
diff --git a/prism/prism.c b/prism/prism.c
index 79258386d60316..ec319f2cac76f8 100644
--- a/prism/prism.c
+++ b/prism/prism.c
@@ -1340,6 +1340,11 @@ pm_assoc_node_create(pm_parser_t *parser, pm_node_t *key, const pm_token_t *oper
         flags = key->flags & value->flags & PM_NODE_FLAG_STATIC_LITERAL;
     }
 
+    // Hash string keys should be frozen
+    if (PM_NODE_TYPE_P(key, PM_STRING_NODE)) {
+        key->flags |= PM_STRING_FLAGS_FROZEN;
+    }
+
     *node = (pm_assoc_node_t) {
         {
             .type = PM_ASSOC_NODE,
@@ -11338,6 +11343,9 @@ parse_arguments(pm_parser_t *parser, pm_arguments_t *arguments, bool accepts_for
                     }
 
                     parsed_bare_hash = true;
+                } else if (accept1(parser, PM_TOKEN_KEYWORD_IN)) {
+                    // TODO: Could we solve this with binding powers instead?
+                    pm_parser_err_current(parser, PM_ERR_ARGUMENT_IN);
                 }
 
                 parse_arguments_append(parser, arguments, argument);
@@ -13349,8 +13357,15 @@ parse_pattern_primitive(pm_parser_t *parser, pm_diagnostic_id_t diag_id) {
             // expression to determine if it's a variable or an expression.
             switch (parser->current.type) {
                 case PM_TOKEN_IDENTIFIER: {
+                    int depth = pm_parser_local_depth(parser, &parser->current);
+
+                    if (depth == -1) {
+                        depth = 0;
+                        PM_PARSER_ERR_TOKEN_FORMAT(parser, parser->current, PM_ERR_NO_LOCAL_VARIABLE, (int) (parser->current.end - parser->current.start), parser->current.start);
+                    }
+
+                    pm_node_t *variable = (pm_node_t *) pm_local_variable_read_node_create(parser, &parser->current, (uint32_t) depth);
                     parser_lex(parser);
-                    pm_node_t *variable = (pm_node_t *) pm_local_variable_read_node_create(parser, &parser->previous, 0);
 
                     return (pm_node_t *) pm_pinned_variable_node_create(parser, &operator, variable);
                 }
@@ -17175,9 +17190,14 @@ parse_expression(pm_parser_t *parser, pm_binding_power_t binding_power, bool acc
 
 static pm_node_t *
 parse_program(pm_parser_t *parser) {
-    pm_parser_scope_push(parser, !parser->current_scope);
-    parser_lex(parser);
+    // If the current scope is NULL, then we want to push a new top level scope.
+    // The current scope could exist in the event that we are parsing an eval
+    // and the user has passed into scopes that already exist.
+    if (parser->current_scope == NULL) {
+        pm_parser_scope_push(parser, true);
+    }
 
+    parser_lex(parser);
     pm_statements_node_t *statements = parse_statements(parser, PM_CONTEXT_MAIN);
     if (!statements) {
         statements = pm_statements_node_create(parser);
diff --git a/prism/templates/lib/prism/node.rb.erb b/prism/templates/lib/prism/node.rb.erb
index 87a94a033839bd..65a4f0fb703e60 100644
--- a/prism/templates/lib/prism/node.rb.erb
+++ b/prism/templates/lib/prism/node.rb.erb
@@ -44,11 +44,11 @@ module Prism
   <%- end -%>
   class <%= node.name -%> < Node
     <%- node.fields.each do |field| -%>
-    # attr_reader <%= field.name %>: <%= field.rbs_class %>
+    # <%= "private " if field.is_a?(Prism::FlagsField) %>attr_reader <%= field.name %>: <%= field.rbs_class %>
     <%= "private " if field.is_a?(Prism::FlagsField) %>attr_reader :<%= field.name %>
 
     <%- end -%>
-    # def initialize: (<%= (node.fields.map { |field| "#{field.name}: #{field.rbs_class}" } + ["location: Location"]).join(", ") %>) -> void
+    # def initialize: (<%= (node.fields.map { |field| "#{field.rbs_class} #{field.name}" } + ["Location location"]).join(", ") %>) -> void
     def initialize(<%= (node.fields.map(&:name) + ["location"]).join(", ") %>)
       <%- node.fields.each do |field| -%>
       @<%= field.name %> = <%= field.name %>
@@ -56,7 +56,7 @@ module Prism
       @location = location
     end
 
-    # def accept: (visitor: Visitor) -> void
+    # def accept: (Visitor visitor) -> void
     def accept(visitor)
       visitor.visit_<%= node.human %>(self)
     end
@@ -137,7 +137,7 @@ module Prism
     # def deconstruct: () -> Array[nil | Node]
     alias deconstruct child_nodes
 
-    # def deconstruct_keys: (keys: Array[Symbol]) -> Hash[Symbol, nil | Node | Array[Node] | String | Token | Array[Token] | Location]
+    # def deconstruct_keys: (Array[Symbol] keys) -> { <%= (node.fields.map { |field| "#{field.name}: #{field.rbs_class}" } + ["location: Location"]).join(", ") %> }
     def deconstruct_keys(keys)
       { <%= (node.fields.map { |field| "#{field.name}: #{field.name}" } + ["location: location"]).join(", ") %> }
     end
@@ -170,7 +170,7 @@ module Prism
     <%- end -%>
     <%- end -%>
 
-    # def inspect(inspector: NodeInspector) -> String
+    # def inspect(NodeInspector inspector) -> String
     def inspect(inspector = NodeInspector.new)
       inspector << inspector.header(self)
       <%- node.fields.each_with_index do |field, index| -%>
diff --git a/test/prism/errors_test.rb b/test/prism/errors_test.rb
index 51ac7bc5cf1e28..57c0719aa72762 100644
--- a/test/prism/errors_test.rb
+++ b/test/prism/errors_test.rb
@@ -1997,6 +1997,21 @@ def test_range_and_bin_op
       end
     end
 
+    def test_command_call_in
+      source = <<~RUBY
+        foo 1 in a
+        a = foo 2 in b
+      RUBY
+      message1 = 'unexpected `in` keyword in arguments'
+      message2 = 'expected a newline or semicolon after the statement'
+      assert_errors expression(source), source, [
+        [message1, 9..10],
+        [message2, 8..8],
+        [message1, 24..25],
+        [message2, 23..23],
+      ]
+    end
+
     def test_constant_assignment_in_method
       source = 'def foo();A=1;end'
       assert_errors expression(source), source, [
diff --git a/test/prism/fixtures/patterns.txt b/test/prism/fixtures/patterns.txt
index d73c8d025e04d4..dcd6786d4b65c0 100644
--- a/test/prism/fixtures/patterns.txt
+++ b/test/prism/fixtures/patterns.txt
@@ -51,7 +51,7 @@ foo => __LINE__ .. __LINE__
 foo => __ENCODING__ .. __ENCODING__
 foo => -> { bar } .. -> { bar }
 
-foo => ^bar
+bar = 1; foo => ^bar
 foo => ^@bar
 foo => ^@@bar
 foo => ^$bar
diff --git a/test/prism/location_test.rb b/test/prism/location_test.rb
index 809c1bd8ae5f05..e5b75469255e45 100644
--- a/test/prism/location_test.rb
+++ b/test/prism/location_test.rb
@@ -673,7 +673,7 @@ def test_PinnedExpressionNode
     end
 
     def test_PinnedVariableNode
-      assert_location(PinnedVariableNode, "foo in ^bar", 7...11, &:pattern)
+      assert_location(PinnedVariableNode, "bar = 1; foo in ^bar", 16...20, &:pattern)
     end
 
     def test_PostExecutionNode
diff --git a/test/prism/ruby_api_test.rb b/test/prism/ruby_api_test.rb
index 3bf89f3339bfe9..7bb80b481a9c3c 100644
--- a/test/prism/ruby_api_test.rb
+++ b/test/prism/ruby_api_test.rb
@@ -42,7 +42,9 @@ def test_options
 
       assert_kind_of Prism::CallNode, Prism.parse("foo").value.statements.body[0]
       assert_kind_of Prism::LocalVariableReadNode, Prism.parse("foo", scopes: [[:foo]]).value.statements.body[0]
-      assert_equal 2, Prism.parse("foo", scopes: [[:foo], []]).value.statements.body[0].depth
+      assert_equal 1, Prism.parse("foo", scopes: [[:foo], []]).value.statements.body[0].depth
+
+      assert_equal [:foo], Prism.parse("foo", scopes: [[:foo]]).value.locals
     end
 
     def test_literal_value_method
diff --git a/test/prism/snapshots/arrays.txt b/test/prism/snapshots/arrays.txt
index d31cd7afc857a7..93f5c8fbc1a864 100644
--- a/test/prism/snapshots/arrays.txt
+++ b/test/prism/snapshots/arrays.txt
@@ -79,7 +79,7 @@
         │   ├── flags: ∅
         │   ├── elements: (length: 1)
         │   │   └── @ KeywordHashNode (location: (5,1)-(5,12))
-        │   │       ├── flags: static_keys
+        │   │       ├── flags: symbol_keys
         │   │       └── elements: (length: 1)
         │   │           └── @ AssocNode (location: (5,1)-(5,12))
         │   │               ├── key:
diff --git a/test/prism/snapshots/if.txt b/test/prism/snapshots/if.txt
index 6733e57bed1f3b..a5ffeac2c25cad 100644
--- a/test/prism/snapshots/if.txt
+++ b/test/prism/snapshots/if.txt
@@ -250,7 +250,7 @@
         │   │           │   ├── flags: ∅
         │   │           │   └── arguments: (length: 1)
         │   │           │       └── @ KeywordHashNode (location: (25,4)-(25,6))
-        │   │           │           ├── flags: static_keys
+        │   │           │           ├── flags: symbol_keys
         │   │           │           └── elements: (length: 1)
         │   │           │               └── @ AssocNode (location: (25,4)-(25,6))
         │   │           │                   ├── key:
diff --git a/test/prism/snapshots/method_calls.txt b/test/prism/snapshots/method_calls.txt
index 65f0d1df165adb..f8de181d3229c7 100644
--- a/test/prism/snapshots/method_calls.txt
+++ b/test/prism/snapshots/method_calls.txt
@@ -782,7 +782,7 @@
         │   │       │   ├── closing_loc: ∅
         │   │       │   └── unescaped: "a"
         │   │       └── @ KeywordHashNode (location: (60,8)-(60,32))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 2)
         │   │               ├── @ AssocNode (location: (60,8)-(60,22))
         │   │               │   ├── key:
@@ -914,7 +914,7 @@
         │   │       │   ├── closing_loc: ∅
         │   │       │   └── unescaped: "a"
         │   │       └── @ KeywordHashNode (location: (64,8)-(64,15))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (64,8)-(64,15))
         │   │                   ├── key:
@@ -983,7 +983,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (66,3)-(66,17))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (66,3)-(66,17))
         │   │                   ├── key:
@@ -1173,7 +1173,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (74,3)-(74,20))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (74,3)-(74,20))
         │   │                   ├── key:
@@ -1236,7 +1236,7 @@
         │   │       │   ├── closing_loc: ∅
         │   │       │   └── unescaped: "a"
         │   │       └── @ KeywordHashNode (location: (82,0)-(82,5))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (82,0)-(82,5))
         │   │                   ├── key:
@@ -1287,7 +1287,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (87,4)-(87,21))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 2)
         │   │               ├── @ AssocNode (location: (87,4)-(87,11))
         │   │               │   ├── key:
@@ -1336,7 +1336,7 @@
         │   │       ├── @ IntegerNode (location: (89,10)-(89,11))
         │   │       │   └── flags: decimal
         │   │       └── @ KeywordHashNode (location: (89,13)-(89,21))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (89,13)-(89,21))
         │   │                   ├── key:
@@ -1527,7 +1527,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (103,4)-(103,11))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (103,4)-(103,11))
         │   │                   ├── key:
@@ -1555,7 +1555,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (105,4)-(105,28))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (105,4)-(105,28))
         │   │                   ├── key:
@@ -1612,7 +1612,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (107,4)-(107,24))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (107,4)-(107,24))
         │   │                   ├── key:
diff --git a/test/prism/snapshots/patterns.txt b/test/prism/snapshots/patterns.txt
index aacdbb250e4c96..13179be338ddc3 100644
--- a/test/prism/snapshots/patterns.txt
+++ b/test/prism/snapshots/patterns.txt
@@ -2,7 +2,7 @@
 ├── locals: [:bar, :baz, :qux, :b, :a, :foo, :x]
 └── statements:
     @ StatementsNode (location: (1,0)-(202,19))
-    └── body: (length: 175)
+    └── body: (length: 176)
         ├── @ MatchRequiredNode (location: (1,0)-(1,10))
         │   ├── value:
         │   │   @ CallNode (location: (1,0)-(1,3))
@@ -1235,26 +1235,34 @@
         │   │   │               └── depth: 1
         │   │   └── operator_loc: (52,18)-(52,20) = ".."
         │   └── operator_loc: (52,4)-(52,6) = "=>"
-        ├── @ MatchRequiredNode (location: (54,0)-(54,11))
+        ├── @ LocalVariableWriteNode (location: (54,0)-(54,7))
+        │   ├── name: :bar
+        │   ├── depth: 0
+        │   ├── name_loc: (54,0)-(54,3) = "bar"
         │   ├── value:
-        │   │   @ CallNode (location: (54,0)-(54,3))
+        │   │   @ IntegerNode (location: (54,6)-(54,7))
+        │   │   └── flags: decimal
+        │   └── operator_loc: (54,4)-(54,5) = "="
+        ├── @ MatchRequiredNode (location: (54,9)-(54,20))
+        │   ├── value:
+        │   │   @ CallNode (location: (54,9)-(54,12))
         │   │   ├── flags: variable_call
         │   │   ├── receiver: ∅
         │   │   ├── call_operator_loc: ∅
         │   │   ├── name: :foo
-        │   │   ├── message_loc: (54,0)-(54,3) = "foo"
+        │   │   ├── message_loc: (54,9)-(54,12) = "foo"
         │   │   ├── opening_loc: ∅
         │   │   ├── arguments: ∅
         │   │   ├── closing_loc: ∅
         │   │   └── block: ∅
         │   ├── pattern:
-        │   │   @ PinnedVariableNode (location: (54,7)-(54,11))
+        │   │   @ PinnedVariableNode (location: (54,16)-(54,20))
         │   │   ├── variable:
-        │   │   │   @ LocalVariableReadNode (location: (54,8)-(54,11))
+        │   │   │   @ LocalVariableReadNode (location: (54,17)-(54,20))
         │   │   │   ├── name: :bar
         │   │   │   └── depth: 0
-        │   │   └── operator_loc: (54,7)-(54,8) = "^"
-        │   └── operator_loc: (54,4)-(54,6) = "=>"
+        │   │   └── operator_loc: (54,16)-(54,17) = "^"
+        │   └── operator_loc: (54,13)-(54,15) = "=>"
         ├── @ MatchRequiredNode (location: (55,0)-(55,12))
         │   ├── value:
         │   │   @ CallNode (location: (55,0)-(55,3))
diff --git a/test/prism/snapshots/rescue.txt b/test/prism/snapshots/rescue.txt
index 3f9dc426a2fd9e..12607e8be2eaab 100644
--- a/test/prism/snapshots/rescue.txt
+++ b/test/prism/snapshots/rescue.txt
@@ -343,7 +343,7 @@
             │   │           │   ├── flags: ∅
             │   │           │   └── arguments: (length: 1)
             │   │           │       └── @ KeywordHashNode (location: (29,4)-(29,6))
-            │   │           │           ├── flags: static_keys
+            │   │           │           ├── flags: symbol_keys
             │   │           │           └── elements: (length: 1)
             │   │           │               └── @ AssocNode (location: (29,4)-(29,6))
             │   │           │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/assoc_label.txt b/test/prism/snapshots/seattlerb/assoc_label.txt
index 1d65eef3f9d72c..c8526358f544d6 100644
--- a/test/prism/snapshots/seattlerb/assoc_label.txt
+++ b/test/prism/snapshots/seattlerb/assoc_label.txt
@@ -15,7 +15,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (1,2)-(1,5))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,2)-(1,5))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/bug_249.txt b/test/prism/snapshots/seattlerb/bug_249.txt
index 4c684f32dcd6c8..c29349142924f2 100644
--- a/test/prism/snapshots/seattlerb/bug_249.txt
+++ b/test/prism/snapshots/seattlerb/bug_249.txt
@@ -66,7 +66,7 @@
             │       │   ├── closing_loc: ∅
             │       │   └── block: ∅
             │       └── @ KeywordHashNode (location: (4,11)-(4,28))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (4,11)-(4,28))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/bug_hash_args.txt b/test/prism/snapshots/seattlerb/bug_hash_args.txt
index cea1fc8db00e85..7900bbe0d1a5e5 100644
--- a/test/prism/snapshots/seattlerb/bug_hash_args.txt
+++ b/test/prism/snapshots/seattlerb/bug_hash_args.txt
@@ -21,7 +21,7 @@
             │       │   ├── closing_loc: ∅
             │       │   └── unescaped: "bar"
             │       └── @ KeywordHashNode (location: (1,10)-(1,18))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,10)-(1,18))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/bug_hash_args_trailing_comma.txt b/test/prism/snapshots/seattlerb/bug_hash_args_trailing_comma.txt
index e4c2a10f2ea6e0..2b2b24622697a1 100644
--- a/test/prism/snapshots/seattlerb/bug_hash_args_trailing_comma.txt
+++ b/test/prism/snapshots/seattlerb/bug_hash_args_trailing_comma.txt
@@ -21,7 +21,7 @@
             │       │   ├── closing_loc: ∅
             │       │   └── unescaped: "bar"
             │       └── @ KeywordHashNode (location: (1,10)-(1,18))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,10)-(1,18))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/call_args_assoc_quoted.txt b/test/prism/snapshots/seattlerb/call_args_assoc_quoted.txt
index 958231a21a708a..9426531d5cada2 100644
--- a/test/prism/snapshots/seattlerb/call_args_assoc_quoted.txt
+++ b/test/prism/snapshots/seattlerb/call_args_assoc_quoted.txt
@@ -57,7 +57,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (3,2)-(3,8))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (3,2)-(3,8))
         │   │                   ├── key:
@@ -85,7 +85,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (5,2)-(5,8))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (5,2)-(5,8))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/call_array_lit_inline_hash.txt b/test/prism/snapshots/seattlerb/call_array_lit_inline_hash.txt
index f8cde2f6a9fda4..f572729b8ac081 100644
--- a/test/prism/snapshots/seattlerb/call_array_lit_inline_hash.txt
+++ b/test/prism/snapshots/seattlerb/call_array_lit_inline_hash.txt
@@ -24,7 +24,7 @@
             │           │   │   ├── closing_loc: ∅
             │           │   │   └── unescaped: "b"
             │           │   └── @ KeywordHashNode (location: (1,7)-(1,14))
-            │           │       ├── flags: static_keys
+            │           │       ├── flags: symbol_keys
             │           │       └── elements: (length: 1)
             │           │           └── @ AssocNode (location: (1,7)-(1,14))
             │           │               ├── key:
diff --git a/test/prism/snapshots/seattlerb/call_assoc_new.txt b/test/prism/snapshots/seattlerb/call_assoc_new.txt
index 6d121252607452..decf68ae6eba34 100644
--- a/test/prism/snapshots/seattlerb/call_assoc_new.txt
+++ b/test/prism/snapshots/seattlerb/call_assoc_new.txt
@@ -15,7 +15,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (1,2)-(1,5))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,2)-(1,5))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/call_assoc_new_if_multiline.txt b/test/prism/snapshots/seattlerb/call_assoc_new_if_multiline.txt
index 1c079f9d1d9db2..c9e0ff969304f8 100644
--- a/test/prism/snapshots/seattlerb/call_assoc_new_if_multiline.txt
+++ b/test/prism/snapshots/seattlerb/call_assoc_new_if_multiline.txt
@@ -15,7 +15,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (1,2)-(5,3))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,2)-(5,3))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/difficult2_.txt b/test/prism/snapshots/seattlerb/difficult2_.txt
index a81b0ce45884ea..72cac371f7fe25 100644
--- a/test/prism/snapshots/seattlerb/difficult2_.txt
+++ b/test/prism/snapshots/seattlerb/difficult2_.txt
@@ -53,7 +53,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (2,2)-(2,6))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (2,2)-(2,6))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/multiline_hash_declaration.txt b/test/prism/snapshots/seattlerb/multiline_hash_declaration.txt
index efa6fa242ddd82..f377bda17cfd40 100644
--- a/test/prism/snapshots/seattlerb/multiline_hash_declaration.txt
+++ b/test/prism/snapshots/seattlerb/multiline_hash_declaration.txt
@@ -15,7 +15,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (1,2)-(3,1))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (1,2)-(3,1))
         │   │                   ├── key:
@@ -45,7 +45,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (5,2)-(6,1))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (5,2)-(6,1))
         │   │                   ├── key:
@@ -75,7 +75,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (8,2)-(8,11))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (8,2)-(8,11))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/quoted_symbol_hash_arg.txt b/test/prism/snapshots/seattlerb/quoted_symbol_hash_arg.txt
index 59bd8f0220fa62..8730eb19117cd7 100644
--- a/test/prism/snapshots/seattlerb/quoted_symbol_hash_arg.txt
+++ b/test/prism/snapshots/seattlerb/quoted_symbol_hash_arg.txt
@@ -15,7 +15,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (1,5)-(1,12))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,5)-(1,12))
             │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/return_call_assocs.txt b/test/prism/snapshots/seattlerb/return_call_assocs.txt
index 8baf6c4c7e06ac..98b7943bac4b05 100644
--- a/test/prism/snapshots/seattlerb/return_call_assocs.txt
+++ b/test/prism/snapshots/seattlerb/return_call_assocs.txt
@@ -12,7 +12,7 @@
         │           ├── @ IntegerNode (location: (1,7)-(1,8))
         │           │   └── flags: decimal
         │           └── @ KeywordHashNode (location: (1,10)-(1,17))
-        │               ├── flags: static_keys
+        │               ├── flags: symbol_keys
         │               └── elements: (length: 1)
         │                   └── @ AssocNode (location: (1,10)-(1,17))
         │                       ├── key:
@@ -35,7 +35,7 @@
         │           ├── @ IntegerNode (location: (3,7)-(3,8))
         │           │   └── flags: decimal
         │           └── @ KeywordHashNode (location: (3,10)-(3,26))
-        │               ├── flags: static_keys
+        │               ├── flags: symbol_keys
         │               └── elements: (length: 2)
         │                   ├── @ AssocNode (location: (3,10)-(3,17))
         │                   │   ├── key:
@@ -79,7 +79,7 @@
         │               │   ├── flags: ∅
         │               │   └── arguments: (length: 1)
         │               │       └── @ KeywordHashNode (location: (5,9)-(5,14))
-        │               │           ├── flags: static_keys
+        │               │           ├── flags: symbol_keys
         │               │           └── elements: (length: 1)
         │               │               └── @ AssocNode (location: (5,9)-(5,14))
         │               │                   ├── key:
@@ -113,7 +113,7 @@
         │               │   ├── flags: ∅
         │               │   └── arguments: (length: 1)
         │               │       └── @ KeywordHashNode (location: (7,9)-(7,12))
-        │               │           ├── flags: static_keys
+        │               │           ├── flags: symbol_keys
         │               │           └── elements: (length: 1)
         │               │               └── @ AssocNode (location: (7,9)-(7,12))
         │               │                   ├── key:
@@ -147,7 +147,7 @@
         │               │   ├── flags: ∅
         │               │   └── arguments: (length: 1)
         │               │       └── @ KeywordHashNode (location: (9,9)-(9,12))
-        │               │           ├── flags: static_keys
+        │               │           ├── flags: symbol_keys
         │               │           └── elements: (length: 1)
         │               │               └── @ AssocNode (location: (9,9)-(9,12))
         │               │                   ├── key:
diff --git a/test/prism/snapshots/seattlerb/yield_call_assocs.txt b/test/prism/snapshots/seattlerb/yield_call_assocs.txt
index 82d1765f210c36..95d64eaaefae27 100644
--- a/test/prism/snapshots/seattlerb/yield_call_assocs.txt
+++ b/test/prism/snapshots/seattlerb/yield_call_assocs.txt
@@ -13,7 +13,7 @@
         │   │       ├── @ IntegerNode (location: (1,6)-(1,7))
         │   │       │   └── flags: decimal
         │   │       └── @ KeywordHashNode (location: (1,9)-(1,16))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (1,9)-(1,16))
         │   │                   ├── key:
@@ -38,7 +38,7 @@
         │   │       ├── @ IntegerNode (location: (3,6)-(3,7))
         │   │       │   └── flags: decimal
         │   │       └── @ KeywordHashNode (location: (3,9)-(3,25))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 2)
         │   │               ├── @ AssocNode (location: (3,9)-(3,16))
         │   │               │   ├── key:
@@ -84,7 +84,7 @@
         │   │           │   ├── flags: ∅
         │   │           │   └── arguments: (length: 1)
         │   │           │       └── @ KeywordHashNode (location: (5,8)-(5,13))
-        │   │           │           ├── flags: static_keys
+        │   │           │           ├── flags: symbol_keys
         │   │           │           └── elements: (length: 1)
         │   │           │               └── @ AssocNode (location: (5,8)-(5,13))
         │   │           │                   ├── key:
@@ -120,7 +120,7 @@
         │   │           │   ├── flags: ∅
         │   │           │   └── arguments: (length: 1)
         │   │           │       └── @ KeywordHashNode (location: (7,8)-(7,11))
-        │   │           │           ├── flags: static_keys
+        │   │           │           ├── flags: symbol_keys
         │   │           │           └── elements: (length: 1)
         │   │           │               └── @ AssocNode (location: (7,8)-(7,11))
         │   │           │                   ├── key:
@@ -156,7 +156,7 @@
         │   │           │   ├── flags: ∅
         │   │           │   └── arguments: (length: 1)
         │   │           │       └── @ KeywordHashNode (location: (9,8)-(9,11))
-        │   │           │           ├── flags: static_keys
+        │   │           │           ├── flags: symbol_keys
         │   │           │           └── elements: (length: 1)
         │   │           │               └── @ AssocNode (location: (9,8)-(9,11))
         │   │           │                   ├── key:
diff --git a/test/prism/snapshots/unparser/corpus/literal/literal.txt b/test/prism/snapshots/unparser/corpus/literal/literal.txt
index 21ae9f670b74ac..a26b9251963980 100644
--- a/test/prism/snapshots/unparser/corpus/literal/literal.txt
+++ b/test/prism/snapshots/unparser/corpus/literal/literal.txt
@@ -9,7 +9,7 @@
         │   │   ├── @ AssocNode (location: (1,2)-(1,21))
         │   │   │   ├── key:
         │   │   │   │   @ StringNode (location: (1,2)-(1,7))
-        │   │   │   │   ├── flags: ∅
+        │   │   │   │   ├── flags: frozen
         │   │   │   │   ├── opening_loc: (1,2)-(1,3) = "\""
         │   │   │   │   ├── content_loc: (1,3)-(1,6) = "foo"
         │   │   │   │   ├── closing_loc: (1,6)-(1,7) = "\""
@@ -39,7 +39,7 @@
         │   │   └── @ AssocNode (location: (1,23)-(1,36))
         │   │       ├── key:
         │   │       │   @ StringNode (location: (1,23)-(1,28))
-        │   │       │   ├── flags: ∅
+        │   │       │   ├── flags: frozen
         │   │       │   ├── opening_loc: (1,23)-(1,24) = "\""
         │   │       │   ├── content_loc: (1,24)-(1,27) = "bar"
         │   │       │   ├── closing_loc: (1,27)-(1,28) = "\""
@@ -59,7 +59,7 @@
         │   │   ├── @ AssocNode (location: (4,2)-(4,14))
         │   │   │   ├── key:
         │   │   │   │   @ StringNode (location: (4,2)-(4,7))
-        │   │   │   │   ├── flags: ∅
+        │   │   │   │   ├── flags: frozen
         │   │   │   │   ├── opening_loc: (4,2)-(4,3) = "\""
         │   │   │   │   ├── content_loc: (4,3)-(4,6) = "foo"
         │   │   │   │   ├── closing_loc: (4,6)-(4,7) = "\""
@@ -75,7 +75,7 @@
         │   │   └── @ AssocNode (location: (4,16)-(4,29))
         │   │       ├── key:
         │   │       │   @ StringNode (location: (4,16)-(4,21))
-        │   │       │   ├── flags: ∅
+        │   │       │   ├── flags: frozen
         │   │       │   ├── opening_loc: (4,16)-(4,17) = "\""
         │   │       │   ├── content_loc: (4,17)-(4,20) = "bar"
         │   │       │   ├── closing_loc: (4,20)-(4,21) = "\""
@@ -184,7 +184,7 @@
         │   │   ├── @ AssocNode (location: (10,2)-(10,21))
         │   │   │   ├── key:
         │   │   │   │   @ StringNode (location: (10,2)-(10,7))
-        │   │   │   │   ├── flags: ∅
+        │   │   │   │   ├── flags: frozen
         │   │   │   │   ├── opening_loc: (10,2)-(10,3) = "\""
         │   │   │   │   ├── content_loc: (10,3)-(10,6) = "foo"
         │   │   │   │   ├── closing_loc: (10,6)-(10,7) = "\""
@@ -231,7 +231,7 @@
         │   │   ├── @ AssocNode (location: (13,2)-(13,14))
         │   │   │   ├── key:
         │   │   │   │   @ StringNode (location: (13,2)-(13,7))
-        │   │   │   │   ├── flags: ∅
+        │   │   │   │   ├── flags: frozen
         │   │   │   │   ├── opening_loc: (13,2)-(13,3) = "\""
         │   │   │   │   ├── content_loc: (13,3)-(13,6) = "foo"
         │   │   │   │   ├── closing_loc: (13,6)-(13,7) = "\""
diff --git a/test/prism/snapshots/unparser/corpus/literal/send.txt b/test/prism/snapshots/unparser/corpus/literal/send.txt
index a96937e87ee7e6..edfd0cc6ae60aa 100644
--- a/test/prism/snapshots/unparser/corpus/literal/send.txt
+++ b/test/prism/snapshots/unparser/corpus/literal/send.txt
@@ -1249,7 +1249,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (63,8)-(63,16))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (63,8)-(63,16))
         │   │                   ├── key:
@@ -1310,7 +1310,7 @@
         │   │               └── @ AssocNode (location: (64,13)-(64,25))
         │   │                   ├── key:
         │   │                   │   @ StringNode (location: (64,13)-(64,18))
-        │   │                   │   ├── flags: ∅
+        │   │                   │   ├── flags: frozen
         │   │                   │   ├── opening_loc: (64,13)-(64,14) = "\""
         │   │                   │   ├── content_loc: (64,14)-(64,17) = "baz"
         │   │                   │   ├── closing_loc: (64,17)-(64,18) = "\""
@@ -1569,7 +1569,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (70,4)-(70,8))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (70,4)-(70,8))
         │   │                   ├── key:
@@ -1615,7 +1615,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (71,6)-(71,10))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (71,6)-(71,10))
         │   │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/args_args_assocs.txt b/test/prism/snapshots/whitequark/args_args_assocs.txt
index d5c0d7d13671de..3d467e39a52376 100644
--- a/test/prism/snapshots/whitequark/args_args_assocs.txt
+++ b/test/prism/snapshots/whitequark/args_args_assocs.txt
@@ -25,7 +25,7 @@
         │   │       │   ├── closing_loc: ∅
         │   │       │   └── block: ∅
         │   │       └── @ KeywordHashNode (location: (1,9)-(1,18))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (1,9)-(1,18))
         │   │                   ├── key:
@@ -63,7 +63,7 @@
             │       │   ├── closing_loc: ∅
             │       │   └── block: ∅
             │       └── @ KeywordHashNode (location: (3,9)-(3,18))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (3,9)-(3,18))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/args_args_assocs_comma.txt b/test/prism/snapshots/whitequark/args_args_assocs_comma.txt
index 2aa16446107977..7b74a1886c0968 100644
--- a/test/prism/snapshots/whitequark/args_args_assocs_comma.txt
+++ b/test/prism/snapshots/whitequark/args_args_assocs_comma.txt
@@ -35,7 +35,7 @@
             │       │   ├── closing_loc: ∅
             │       │   └── block: ∅
             │       └── @ KeywordHashNode (location: (1,9)-(1,18))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,9)-(1,18))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/args_assocs.txt b/test/prism/snapshots/whitequark/args_assocs.txt
index bf51dda187b019..e4acaca435bb56 100644
--- a/test/prism/snapshots/whitequark/args_assocs.txt
+++ b/test/prism/snapshots/whitequark/args_assocs.txt
@@ -15,7 +15,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (1,4)-(1,13))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (1,4)-(1,13))
         │   │                   ├── key:
@@ -43,7 +43,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (3,4)-(3,13))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (3,4)-(3,13))
         │   │                   ├── key:
@@ -95,7 +95,7 @@
         │   │       │   ├── closing_loc: ∅
         │   │       │   └── block: ∅
         │   │       └── @ KeywordHashNode (location: (5,14)-(5,21))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (5,14)-(5,21))
         │   │                   ├── key:
@@ -124,7 +124,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (7,5)-(7,14))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (7,5)-(7,14))
         │   │                   ├── key:
@@ -148,7 +148,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (9,6)-(9,16))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (9,6)-(9,16))
         │   │                   ├── key:
@@ -172,7 +172,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (11,6)-(11,16))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (11,6)-(11,16))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/args_assocs_comma.txt b/test/prism/snapshots/whitequark/args_assocs_comma.txt
index b98aa39cb778eb..0ced5c7bc67f24 100644
--- a/test/prism/snapshots/whitequark/args_assocs_comma.txt
+++ b/test/prism/snapshots/whitequark/args_assocs_comma.txt
@@ -25,7 +25,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (1,4)-(1,13))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,4)-(1,13))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/args_assocs_legacy.txt b/test/prism/snapshots/whitequark/args_assocs_legacy.txt
index bf51dda187b019..e4acaca435bb56 100644
--- a/test/prism/snapshots/whitequark/args_assocs_legacy.txt
+++ b/test/prism/snapshots/whitequark/args_assocs_legacy.txt
@@ -15,7 +15,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (1,4)-(1,13))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (1,4)-(1,13))
         │   │                   ├── key:
@@ -43,7 +43,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (3,4)-(3,13))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (3,4)-(3,13))
         │   │                   ├── key:
@@ -95,7 +95,7 @@
         │   │       │   ├── closing_loc: ∅
         │   │       │   └── block: ∅
         │   │       └── @ KeywordHashNode (location: (5,14)-(5,21))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (5,14)-(5,21))
         │   │                   ├── key:
@@ -124,7 +124,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (7,5)-(7,14))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (7,5)-(7,14))
         │   │                   ├── key:
@@ -148,7 +148,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (9,6)-(9,16))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (9,6)-(9,16))
         │   │                   ├── key:
@@ -172,7 +172,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (11,6)-(11,16))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (11,6)-(11,16))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/bug_cmdarg.txt b/test/prism/snapshots/whitequark/bug_cmdarg.txt
index 6779d117351c15..428d061ee41402 100644
--- a/test/prism/snapshots/whitequark/bug_cmdarg.txt
+++ b/test/prism/snapshots/whitequark/bug_cmdarg.txt
@@ -15,7 +15,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (1,7)-(1,15))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (1,7)-(1,15))
         │   │                   ├── key:
@@ -65,7 +65,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (5,2)-(5,26))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (5,2)-(5,26))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/keyword_argument_omission.txt b/test/prism/snapshots/whitequark/keyword_argument_omission.txt
index 3ff3f9a176ed6d..afcfd87c49e809 100644
--- a/test/prism/snapshots/whitequark/keyword_argument_omission.txt
+++ b/test/prism/snapshots/whitequark/keyword_argument_omission.txt
@@ -15,7 +15,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (1,4)-(1,10))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 2)
             │               ├── @ AssocNode (location: (1,4)-(1,6))
             │               │   ├── key:
diff --git a/test/prism/snapshots/whitequark/newline_in_hash_argument.txt b/test/prism/snapshots/whitequark/newline_in_hash_argument.txt
index 0e036fbd85f0e7..5f5c1e406c2aa8 100644
--- a/test/prism/snapshots/whitequark/newline_in_hash_argument.txt
+++ b/test/prism/snapshots/whitequark/newline_in_hash_argument.txt
@@ -93,7 +93,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (10,8)-(11,1))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (10,8)-(11,1))
         │   │                   ├── key:
@@ -131,7 +131,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (13,8)-(14,1))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (13,8)-(14,1))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/parser_bug_525.txt b/test/prism/snapshots/whitequark/parser_bug_525.txt
index 087cc76e1b04d7..7289bdf81b54ae 100644
--- a/test/prism/snapshots/whitequark/parser_bug_525.txt
+++ b/test/prism/snapshots/whitequark/parser_bug_525.txt
@@ -15,7 +15,7 @@
             │   ├── flags: ∅
             │   └── arguments: (length: 1)
             │       └── @ KeywordHashNode (location: (1,3)-(1,11))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,3)-(1,11))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/ruby_bug_11380.txt b/test/prism/snapshots/whitequark/ruby_bug_11380.txt
index cd2939f8bb2f58..7ab13b891ef14e 100644
--- a/test/prism/snapshots/whitequark/ruby_bug_11380.txt
+++ b/test/prism/snapshots/whitequark/ruby_bug_11380.txt
@@ -31,7 +31,7 @@
             │       │               ├── closing_loc: ∅
             │       │               └── unescaped: "hello"
             │       └── @ KeywordHashNode (location: (1,17)-(1,21))
-            │           ├── flags: static_keys
+            │           ├── flags: symbol_keys
             │           └── elements: (length: 1)
             │               └── @ AssocNode (location: (1,17)-(1,21))
             │                   ├── key:
diff --git a/test/prism/snapshots/whitequark/ruby_bug_12073.txt b/test/prism/snapshots/whitequark/ruby_bug_12073.txt
index 521df7a0135c61..27f2838bce3e1a 100644
--- a/test/prism/snapshots/whitequark/ruby_bug_12073.txt
+++ b/test/prism/snapshots/whitequark/ruby_bug_12073.txt
@@ -23,7 +23,7 @@
         │   │   ├── flags: ∅
         │   │   └── arguments: (length: 1)
         │   │       └── @ KeywordHashNode (location: (1,9)-(1,13))
-        │   │           ├── flags: static_keys
+        │   │           ├── flags: symbol_keys
         │   │           └── elements: (length: 1)
         │   │               └── @ AssocNode (location: (1,9)-(1,13))
         │   │                   ├── key: