diff --git a/libc-test/src/functionalext/common/functionalext.h b/libc-test/src/functionalext/common/functionalext.h
index e8348749b56180e0bd0e70381f4bf6f8639117d0..c9af4ef484eedd76fd9c790f3faf3d20b6103015 100644
--- a/libc-test/src/functionalext/common/functionalext.h
+++ b/libc-test/src/functionalext/common/functionalext.h
@@ -23,7 +23,6 @@
 #include <string.h>
 #include "test.h"
 
-#define TIME_ZONE_SUB_TAG '/'
 #define EPS (0.00001)
 #define CMPFLAG 0
 #define ERREXPECT (-1)
@@ -130,4 +129,4 @@
         }                                                 \
     } while (0)
 
-#endif
\ No newline at end of file
+#endif
diff --git a/libc-test/src/functionalext/common/time_test_data.h b/libc-test/src/functionalext/common/time_test_data.h
index 97cc13dfaf596532c92fadcf2599625ec592f796..7bf38f628cb0da3de4f24b7e78fe30aaab478153 100644
--- a/libc-test/src/functionalext/common/time_test_data.h
+++ b/libc-test/src/functionalext/common/time_test_data.h
@@ -20,8 +20,6 @@
 #include <string.h>
 #include <time.h>
 
-#define TIME_ZONE_SUB_TAG '/'
-
 struct time_test_string_struct {
     const char *tz;
     const char *result;