diff --git a/tests/suites/test_suite_x509write.data b/tests/suites/test_suite_x509write.data
index e41de849b7..f63ae2bea3 100644
--- a/tests/suites/test_suite_x509write.data
+++ b/tests/suites/test_suite_x509write.data
@@ -266,8 +266,5 @@ mbedtls_x509_string_to_names:"C=NL, 2.5.4.10.234.532=#0C084F6666737061726B, OU=P
 Check max serial length
 x509_set_serial_check:
 
-Check max extension length (Max-1)
-x509_set_extension_length_check:0xFFFFFFFE
-
-Check max extension length (Max)
-x509_set_extension_length_check:SIZE_MAX
+Check max extension length
+x509_set_extension_length_check:
diff --git a/tests/suites/test_suite_x509write.function b/tests/suites/test_suite_x509write.function
index 7ec6557271..11b5f2a024 100644
--- a/tests/suites/test_suite_x509write.function
+++ b/tests/suites/test_suite_x509write.function
@@ -752,7 +752,7 @@ exit:
 /* END_CASE */
 
 /* BEGIN_CASE */
-void x509_set_extension_length_check(int val_len)
+void x509_set_extension_length_check()
 {
     int ret = 0;
 
@@ -767,7 +767,7 @@ void x509_set_extension_length_check(int val_len)
                                      MBEDTLS_OID_SIZE(MBEDTLS_OID_EXTENDED_KEY_USAGE),
                                      0,
                                      p,
-                                     val_len);
-    TEST_ASSERT(ret == MBEDTLS_ERR_X509_BAD_INPUT_DATA || ret == MBEDTLS_ERR_X509_ALLOC_FAILED);
+                                     SIZE_MAX);
+    TEST_ASSERT(MBEDTLS_ERR_X509_BAD_INPUT_DATA == ret);
 }
 /* END_CASE */