diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index a12b454..9fd0a61 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -1279,11 +1279,8 @@
                               psa_key_usage_t usage,
                               psa_algorithm_t alg)
 {
-    if( policy != NULL )
-    {
-        policy->usage = usage;
-        policy->alg = alg;
-    }
+    policy->usage = usage;
+    policy->alg = alg;
 }
 
 psa_key_usage_t psa_key_policy_get_usage(psa_key_policy_t *policy)
diff --git a/tests/suites/test_suite_psa_crypto.data b/tests/suites/test_suite_psa_crypto.data
index c1261bc..2c2be21 100644
--- a/tests/suites/test_suite_psa_crypto.data
+++ b/tests/suites/test_suite_psa_crypto.data
@@ -86,3 +86,9 @@
 
 PSA Key Policy set and get
 key_policy:PSA_KEY_USAGE_ENCRYPT:PSA_ALG_CBC_BASE
+
+PSA Key Policy enforcment - export
+key_policy_fail:PSA_KEY_USAGE_EXPORT:PSA_ALG_RSA_PKCS1V15_RAW:PSA_ERROR_NOT_PERMITTED:"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"
+
+PSA Key Policy enforcment - sign
+key_policy_fail:PSA_KEY_USAGE_SIGN:PSA_ALG_CBC_BASE:PSA_ERROR_NOT_PERMITTED:""
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index 653467b..b0cfe20 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -389,7 +389,7 @@
 void key_policy( int usage_arg, int alg_arg )
 {
     int key_slot = 1;
-    psa_key_type_t key_type = PSA_ALG_CBC_BASE;
+    psa_key_type_t key_type = PSA_KEY_TYPE_AES;
     unsigned char key[32] = {0};
     psa_key_policy_t policy_set = {0};
     psa_key_policy_t policy_get = {0};
@@ -423,3 +423,55 @@
 }
 /* END_CASE */
 
+/* BEGIN_CASE */
+void key_policy_fail( int usage_arg, int alg_arg, int expected_status, char *key_hex )
+{
+    int key_slot = 1;
+    psa_key_type_t key_type = PSA_KEY_TYPE_AES;
+    unsigned char key[32] = {0};
+    unsigned char* keypair = NULL;
+    size_t key_size = 0;
+    size_t signature_length = 0;
+    psa_key_policy_t policy = {0};
+    int actual_status = PSA_SUCCESS;
+        
+    memset( key, 0x2a, sizeof( key ) );
+ 
+    TEST_ASSERT( psa_crypto_init( ) == PSA_SUCCESS );
+
+    psa_key_policy_init( &policy );
+
+    psa_key_policy_set_usage( &policy, usage_arg, alg_arg );
+
+    TEST_ASSERT( psa_set_key_policy( key_slot, &policy ) == PSA_SUCCESS );
+
+    switch( usage_arg )
+    {
+        case PSA_KEY_USAGE_EXPORT:
+            keypair = unhexify_alloc( key_hex, &key_size );
+            TEST_ASSERT( keypair != NULL );
+            key_type = PSA_KEY_TYPE_RSA_KEYPAIR;
+            TEST_ASSERT( psa_import_key( key_slot, key_type,
+                                 keypair, key_size ) == PSA_SUCCESS );
+            actual_status = psa_asymmetric_sign( key_slot, 
+                            ( psa_algorithm_t )alg_arg, NULL, 0, NULL, 0, 
+                            NULL, 0, &signature_length );
+            break;
+        
+        case PSA_KEY_USAGE_SIGN:
+            key_type = PSA_KEY_TYPE_AES;
+            TEST_ASSERT( psa_import_key( key_slot, key_type,
+                                 key, sizeof( key ) ) == PSA_SUCCESS );
+            actual_status = psa_export_key( key_slot, NULL, 0, NULL );
+            break;
+        default:
+            break;
+    }
+
+    TEST_ASSERT( actual_status == expected_status );
+
+exit:
+    psa_destroy_key( key_slot );
+    mbedtls_psa_crypto_free( );
+}
+/* END_CASE */