diff --git a/test/core/test_library_loading.rb b/test/core/test_library_loading.rb
index b36334e3..88eb20ac 100644
--- a/test/core/test_library_loading.rb
+++ b/test/core/test_library_loading.rb
@@ -11,9 +11,7 @@ def test_naming_convention_for_bundler
   compilable_paths = Dir.glob('lib/**/*.rb')
   raise unless compilable_paths.size >= 5
 
-  compilable_paths.each do |path|
-    data(path, path)
-  end
+  data(compilable_paths.to_h { |path| [path, path] })
   def test_vm_compilable(path)
     assert_instance_of(String, RubyVM::InstructionSequence.compile_file(path).to_binary)
   end
diff --git a/test/core/test_ractor_shareable.rb b/test/core/test_ractor_shareable.rb
index 167ab16c..52cc7935 100644
--- a/test/core/test_ractor_shareable.rb
+++ b/test/core/test_ractor_shareable.rb
@@ -43,9 +43,7 @@ def test_instances_are_can_be_shareable
   const_name_to_value = ULID.constants.to_h { |const_name| [const_name, ULID.const_get(const_name)] }
   raise unless const_name_to_value.size >= 10
 
-  const_name_to_value.each_pair do |name, value|
-    data(name.to_s, value)
-  end
+  data(const_name_to_value)
   def test_shareable_constants(const_value)
     assert_true(Ractor.shareable?(const_value))
 
diff --git a/test/core/test_ulid_instance.rb b/test/core/test_ulid_instance.rb
index 00bf2afb..bc0f10ab 100644
--- a/test/core/test_ulid_instance.rb
+++ b/test/core/test_ulid_instance.rb
@@ -351,9 +351,7 @@ def test_freeze
     assert_same(ulid, ulid.freeze)
   end
 
-  ULID_RETURNING_METHODS.each do |method_name|
-    data("ULID##{method_name}", method_name)
-  end
+  data(ULID_RETURNING_METHODS.to_h { |method_name| ["ULID##{method_name}", method_name] })
   def test_all_returned_ulids_are_frozen(method_name)
     assert_true(ULID.sample.public_send(method_name).frozen?)
   end