diff --git a/tests/suites/test_suite_bignum.function b/tests/suites/test_suite_bignum.function
index 7f858e5..7ccc481 100644
--- a/tests/suites/test_suite_bignum.function
+++ b/tests/suites/test_suite_bignum.function
@@ -834,7 +834,7 @@
     } else if (strcmp(result_comparison, "!=") == 0) {
         TEST_ASSERT(mbedtls_mpi_cmp_mpi(&Z, &A) != 0);
     } else {
-        TEST_ASSERT("unknown operator" == 0);
+        TEST_FAIL("unknown operator");
     }
 
 exit:
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index c142d42..a94594f 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -702,7 +702,7 @@
     } else if (strcmp(profile_str, "all") == 0) {
         profile = &profile_all;
     } else {
-        TEST_ASSERT("Unknown algorithm profile" == 0);
+        TEST_FAIL("Unknown algorithm profile");
     }
 
     if (strcmp(verify_callback, "NULL") == 0) {
@@ -712,7 +712,7 @@
     } else if (strcmp(verify_callback, "verify_all") == 0) {
         f_vrfy = verify_all;
     } else {
-        TEST_ASSERT("No known verify callback selected" == 0);
+        TEST_FAIL("No known verify callback selected");
     }
 
     TEST_EQUAL(mbedtls_x509_crt_parse_file(&crt, crt_file), 0);
@@ -881,7 +881,7 @@
     } else if (strcmp(entity, "issuer") == 0) {
         res =  mbedtls_x509_dn_gets(buf, 2000, &crt.issuer);
     } else {
-        TEST_ASSERT("Unknown entity" == 0);
+        TEST_FAIL("Unknown entity");
     }
 
     TEST_ASSERT(res != -1);
@@ -1006,7 +1006,7 @@
     } else if (strcmp(entity, "valid_to") == 0) {
         TEST_EQUAL(mbedtls_x509_time_is_past(&crt.valid_to), result);
     } else {
-        TEST_ASSERT("Unknown entity" == 0);
+        TEST_FAIL("Unknown entity");
     }
 
 exit:
@@ -1030,7 +1030,7 @@
     } else if (strcmp(entity, "valid_to") == 0) {
         TEST_EQUAL(mbedtls_x509_time_is_future(&crt.valid_to), result);
     } else {
-        TEST_ASSERT("Unknown entity" == 0);
+        TEST_FAIL("Unknown entity");
     }
 
 exit: