diff --git a/core/modules/simpletest/tests/system_incompatible_core_version_test.info b/core/modules/simpletest/tests/system_incompatible_core_version_test.info
index 7b138ee..ced53e9 100644
--- a/core/modules/simpletest/tests/system_incompatible_core_version_test.info
+++ b/core/modules/simpletest/tests/system_incompatible_core_version_test.info
@@ -2,5 +2,5 @@ name = "System incompatible core version test"
 description = "Support module for testing system dependencies."
 package = Testing
 version = VERSION
-core = 9.x
+core = 5.x
 hidden = TRUE