Remove duplicated "test" prefix

activerecord/test/cases/adapters/mysql2/boolean_test.rb

@@ -38,7 +38,7 @@ class Mysql2BooleanTest < ActiveRecord::Mysql2TestCase
     assert_equal :string, string_column.type
   end
 
-  test "test type casting with emulated booleans" do
+  test "type casting with emulated booleans" do
     emulate_booleans true
 
     boolean = BooleanType.create!(archived: true, published: true)
@@ -55,7 +55,7 @@ class Mysql2BooleanTest < ActiveRecord::Mysql2TestCase
     assert_equal 0, @connection.type_cast(false)
   end
 
-  test "test type casting without emulated booleans" do
+  test "type casting without emulated booleans" do
     emulate_booleans false
 
     boolean = BooleanType.create!(archived: true, published: true)

activerecord/test/cases/cache_key_test.rb

@@ -15,7 +15,7 @@ module ActiveRecord
       @connection.drop_table :cache_mes, if_exists: true
     end
 
-    test "test_cache_key_format_is_not_too_precise" do
+    test "cache_key format is not too precise" do
       record = CacheMe.create
       key = record.cache_key
 

activerecord/test/cases/relation/mutation_test.rb

@@ -143,7 +143,7 @@ module ActiveRecord
       assert_equal({ foo: "bar" }, relation.create_with_value)
     end
 
-    test "test_merge!" do
+    test "merge!" do
       assert relation.merge!(select: :foo).equal?(relation)
       assert_equal [:foo], relation.select_values
     end

railties/test/application/rake/migrations_test.rb

@@ -77,7 +77,7 @@ module ApplicationTests
         assert_equal "Schema migrations table does not exist yet.\n", output
       end
 
-      test "test migration status" do
+      test "migration status" do
         Dir.chdir(app_path) do
           `bin/rails generate model user username:string password:string;
            bin/rails generate migration add_email_to_users email:string;
@@ -117,7 +117,7 @@ module ApplicationTests
         end
       end
 
-      test "test migration status after rollback and redo" do
+      test "migration status after rollback and redo" do
         Dir.chdir(app_path) do
           `bin/rails generate model user username:string password:string;
            bin/rails generate migration add_email_to_users email:string;
@@ -224,7 +224,7 @@ module ApplicationTests
         end
       end
 
-      test "test migration status migrated file is deleted" do
+      test "migration status migrated file is deleted" do
         Dir.chdir(app_path) do
           `bin/rails generate model user username:string password:string;
            bin/rails generate migration add_email_to_users email:string;

railties/test/application/test_runner_test.rb

@@ -323,7 +323,7 @@ module ApplicationTests
             assert true
           end
 
-          test "test line filter does not run this" do
+          test "line filter does not run this" do
             assert true
           end
         end