diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index 938917ad71..894e0bb18e 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -932,7 +932,7 @@ void mbedtls_x509_dn_get_next(char *name_str,
     memset(&parsed, 0, sizeof(parsed));
     mbedtls_x509_name *parsed_cur;
     // Size of buf is maximum required for test cases
-    unsigned char buf[80] = {0};
+    unsigned char buf[80] = { 0 };
     unsigned char *out = NULL;
     unsigned char *c = buf + sizeof(buf);
     const char *short_name;
diff --git a/tests/suites/test_suite_x509write.function b/tests/suites/test_suite_x509write.function
index 06e08168cb..4de9addca0 100644
--- a/tests/suites/test_suite_x509write.function
+++ b/tests/suites/test_suite_x509write.function
@@ -703,8 +703,8 @@ void mbedtls_x509_string_to_names(char *name, char *parsed_name,
     memset(&parsed, 0, sizeof(parsed));
     mbedtls_x509_name *parsed_cur = NULL;
     mbedtls_x509_name *parsed_prv = NULL;
-    unsigned char buf[1024] = {0};
-    unsigned char out[1024] = {0};
+    unsigned char buf[1024] = { 0 };
+    unsigned char out[1024] = { 0 };
     unsigned char *c = buf + sizeof(buf);
 
     USE_PSA_INIT();