diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index ce590de..808abcf 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -2060,8 +2060,7 @@
                                    sig, sizeof(sig), &sig_len,
                                    mbedtls_test_rnd_std_rand, NULL), 0);
 
-    /* Trying to perform a verify_ext() using the opaque context is not supported
-     * so here we verify that this does not crash. */
+    /* verify_ext() is not supported when using an opaque context. */
     if (key_pk_type == MBEDTLS_PK_RSASSA_PSS) {
         mbedtls_pk_rsassa_pss_options pss_opts = {
             .mgf1_hash_id = md_alg,
@@ -2070,6 +2069,10 @@
         TEST_EQUAL(mbedtls_pk_verify_ext(key_pk_type, &pss_opts, &pk, md_alg,
                                          hash, hash_len, sig, sig_len),
                    MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE);
+    } else {
+        TEST_EQUAL(mbedtls_pk_verify_ext(key_pk_type, NULL, &pk, md_alg,
+                                         hash, hash_len, sig, sig_len),
+                   MBEDTLS_ERR_PK_TYPE_MISMATCH);
     }
 
     mbedtls_pk_free(&pk);