diff --git a/lib/rdf/mixin/enumerable.rb b/lib/rdf/mixin/enumerable.rb
index cbf9feaf..c874eeaa 100644
--- a/lib/rdf/mixin/enumerable.rb
+++ b/lib/rdf/mixin/enumerable.rb
@@ -122,7 +122,7 @@ def validate!
     # @see    #each_statement
     # @see    #enum_statement
     def statements(**options)
-      Array(enum_statement)
+      enum_statement.to_a
     end
 
     ##
@@ -311,7 +311,7 @@ def subjects(unique: true)
       unless unique
         enum_statement.map(&:subject) # TODO: optimize
       else
-        Array(enum_subject)
+        enum_subject.to_a
       end
     end
 
@@ -376,7 +376,7 @@ def predicates(unique: true)
       unless unique
         enum_statement.map(&:predicate) # TODO: optimize
       else
-        Array(enum_predicate)
+        enum_predicate.to_a
       end
     end
 
@@ -441,7 +441,7 @@ def objects(unique: true)
       unless unique
         enum_statement.map(&:object) # TODO: optimize
       else
-        Array(enum_object)
+        enum_object.to_a
       end
     end
 
@@ -514,7 +514,7 @@ def terms(unique: true)
           flatten.
           compact
       else
-        Array(enum_term)
+        enum_term.to_a
       end
     end
 
@@ -759,7 +759,7 @@ def dump(*args, **options)
     # @overload #to_writer
     #   Implements #to_writer for each available instance of {RDF::Writer},
     #   based on the writer symbol.
-    #  
+    #
     #   @return [String]
     #   @see {RDF::Writer.sym}
     def method_missing(meth, *args)
@@ -780,7 +780,7 @@ def method_missing(meth, *args)
     end
 
     ##
-    # @note this instantiates an writer; it could probably be done more 
+    # @note this instantiates an writer; it could probably be done more
     #   efficiently by refactoring `RDF::Reader` and/or `RDF::Format` to expose
     #   a list of valid format symbols.
     def respond_to_missing?(name, include_private = false)
diff --git a/spec/mixin_enumerable_spec.rb b/spec/mixin_enumerable_spec.rb
index faa087bf..bd5a92d5 100644
--- a/spec/mixin_enumerable_spec.rb
+++ b/spec/mixin_enumerable_spec.rb
@@ -79,6 +79,14 @@
       end
     end
 
+    context "Not using any deprecated method" do
+      %w(subjects predicates objects statements triples quads).each do |method|
+        it "##{method}" do
+          expect { subject.send(method.to_sym).to_a }.not_to output.to_stderr
+        end
+      end
+    end
+
     context "Obtaining all unique values" do
       %w(subjects predicates objects).each do |method|
         it "##{method}" do