diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index 94a76172db..62682256d1 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -305,7 +305,7 @@ void pk_invalid_param()
     mbedtls_pk_context ctx;
     mbedtls_md_type_t md_alg_none = MBEDTLS_MD_NONE;
     mbedtls_pk_type_t pk_type = 0;
-    unsigned char buf[] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06};
+    unsigned char buf[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };
     size_t buf_size = sizeof( buf );
 
     mbedtls_pk_init( &ctx );