diff --git a/activerecord/test/cases/connection_adapters/type_lookup_test.rb b/activerecord/test/cases/connection_adapters/type_lookup_test.rb
index 3acbafbff4cd5..3579c4200545f 100644
--- a/activerecord/test/cases/connection_adapters/type_lookup_test.rb
+++ b/activerecord/test/cases/connection_adapters/type_lookup_test.rb
@@ -89,12 +89,20 @@ def test_bigint_limit
       end
 
       def test_decimal_without_scale
-        types = %w{decimal(2) decimal(2,0) numeric(2) numeric(2,0) number(2) number(2,0)}
-        types.each do |type|
-          cast_type = @connection.type_map.lookup(type)
-
-          assert_equal :decimal, cast_type.type
-          assert_equal 2, cast_type.cast(2.1)
+        if current_adapter?(:OracleAdapter)
+          {
+            decimal: %w{decimal(2) decimal(2,0) numeric(2) numeric(2,0)},
+            integer: %w{number(2) number(2,0)}
+          }
+        else
+          { decimal: %w{decimal(2) decimal(2,0) numeric(2) numeric(2,0) number(2) number(2,0)} }
+        end.each do |expected_type, types|
+          types.each do |type|
+            cast_type = @connection.type_map.lookup(type)
+
+            assert_equal expected_type, cast_type.type
+            assert_equal 2, cast_type.cast(2.1)
+          end
         end
       end