diff --git a/test/core/end2end/end2end_nosec_tests.c b/test/core/end2end/end2end_nosec_tests.c
index c0bea7b..e1974a7 100644
--- a/test/core/end2end/end2end_nosec_tests.c
+++ b/test/core/end2end/end2end_nosec_tests.c
@@ -259,7 +259,7 @@
       trailing_metadata(config);
       continue;
     }
-    gpr_log(GPR_DEBUG, "not a test: '%%s'", argv[i]);
+    gpr_log(GPR_DEBUG, "not a test: '%s'", argv[i]);
     abort();
   }
 }