diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 526239768a..a2b0995ba8 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -231,6 +231,7 @@ scripts/config.pl unset MBEDTLS_PLATFORM_MEMORY
 scripts/config.pl unset MBEDTLS_PLATFORM_PRINTF_ALT
 scripts/config.pl unset MBEDTLS_PLATFORM_FPRINTF_ALT
 scripts/config.pl unset MBEDTLS_PLATFORM_SNPRINTF_ALT
+scripts/config.pl unset MBEDTLS_PLATFORM_TIME_ALT
 scripts/config.pl unset MBEDTLS_PLATFORM_EXIT_ALT
 scripts/config.pl unset MBEDTLS_ENTROPY_NV_SEED
 scripts/config.pl unset MBEDTLS_MEMORY_BUFFER_ALLOC_C