diff --git a/tests/api.c b/tests/api.c
index cd44528fc..f4424a22f 100644
--- a/tests/api.c
+++ b/tests/api.c
@@ -2869,10 +2869,10 @@ static void test_wolfSSL_UseMaxFragment(void)
     /* error cases */
     AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_CTX_UseMaxFragment(NULL, WOLFSSL_MFL_2_9));
     AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_UseMaxFragment(    NULL, WOLFSSL_MFL_2_9));
-    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_CTX_UseMaxFragment(ctx, 0));
-    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_CTX_UseMaxFragment(ctx, 6));
-    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_UseMaxFragment(ssl, 0));
-    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_UseMaxFragment(ssl, 6));
+    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_CTX_UseMaxFragment(ctx, WOLFSSL_MFL_MIN-1));
+    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_CTX_UseMaxFragment(ctx, WOLFSSL_MFL_MAX+1));
+    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_UseMaxFragment(ssl, WOLFSSL_MFL_MIN-1));
+    AssertIntNE(WOLFSSL_SUCCESS, wolfSSL_UseMaxFragment(ssl, WOLFSSL_MFL_MAX+1));
 
     /* success case */
     AssertIntEQ(WOLFSSL_SUCCESS, wolfSSL_CTX_UseMaxFragment(ctx,  WOLFSSL_MFL_2_8));