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-rw-r--r--test/-ext-/st/test_foreach.rb1
-rw-r--r--test/-ext-/st/test_numhash.rb1
-rw-r--r--test/-ext-/st/test_update.rb1
3 files changed, 3 insertions, 0 deletions
diff --git a/test/-ext-/st/test_foreach.rb b/test/-ext-/st/test_foreach.rb
index 259b0a93b12..4b3eb870e48 100644
--- a/test/-ext-/st/test_foreach.rb
+++ b/test/-ext-/st/test_foreach.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/st/foreach'
diff --git a/test/-ext-/st/test_numhash.rb b/test/-ext-/st/test_numhash.rb
index 24dc87c1d9d..97c3a755bbc 100644
--- a/test/-ext-/st/test_numhash.rb
+++ b/test/-ext-/st/test_numhash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/st/numhash"
diff --git a/test/-ext-/st/test_update.rb b/test/-ext-/st/test_update.rb
index 1b41d2bc03f..db86eeb8d7e 100644
--- a/test/-ext-/st/test_update.rb
+++ b/test/-ext-/st/test_update.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/st/update"