diff --git a/test/psych/json/test_stream.rb b/test/psych/json/test_stream.rb
index 4690ad2f1e..b0c33e6a2a 100644
--- a/test/psych/json/test_stream.rb
+++ b/test/psych/json/test_stream.rb
@@ -65,7 +65,7 @@ module Psych
         @stream.push list
 
         json = @io.string
-        assert_match(/]$/, json)
+        assert_match(/\]$/, json)
         assert_match(/^--- \[/, json)
         assert_match(/["]one["]/, json)
         assert_match(/["]two["]/, json)
diff --git a/test/psych/test_json_tree.rb b/test/psych/test_json_tree.rb
index 60f8321e68..a23fc1ac8f 100644
--- a/test/psych/test_json_tree.rb
+++ b/test/psych/test_json_tree.rb
@@ -45,7 +45,7 @@ module Psych
     def test_list_to_json
       list = %w{ one two }
       json = Psych.to_json(list)
-      assert_match(/]$/, json)
+      assert_match(/\]$/, json)
       assert_match(/^\[/, json)
       assert_match(/"one"/, json)
       assert_match(/"two"/, json)