diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb
index 35095f2b2d58d6671e336aaf7e77e4f234ae1b12..b97aa56aef112f44eb2ecfee8f0362ef7d3c4c92 100644
--- a/activesupport/test/core_ext/string_ext_test.rb
+++ b/activesupport/test/core_ext/string_ext_test.rb
@@ -418,7 +418,7 @@ def test_partial_string_to_time
       now = Time.now
       assert_equal Time.local(now.year, now.month, now.day, 23, 50), "23:50".to_time
       assert_equal Time.utc(now.year, now.month, now.day, 23, 50), "23:50".to_time(:utc)
-      assert_equal Time.local(now.year, now.month, now.day, 18, 50), "13:50 -0100".to_time
+      assert_equal Time.local(now.year, now.month, now.day, 17, 50), "13:50 -0100".to_time
       assert_equal Time.utc(now.year, now.month, now.day, 23, 50), "22:50 -0100".to_time(:utc)
     end
   end