diff --git a/tests/suites/test_suite_cipher.function b/tests/suites/test_suite_cipher.function
index 4e616d3..773c792 100644
--- a/tests/suites/test_suite_cipher.function
+++ b/tests/suites/test_suite_cipher.function
@@ -35,6 +35,8 @@
         *( mbedtls_cipher_list() ) );
     size_t size_t_var;
 
+    (void)valid_mode; /* In some configurations this is unused */
+
     mbedtls_cipher_init( &valid_ctx );
     mbedtls_cipher_setup( &valid_ctx, valid_info );
     mbedtls_cipher_init( &invalid_ctx );
@@ -157,6 +159,8 @@
 
     size_t size_t_var;
 
+    (void)valid_mode; /* In some configurations this is unused */
+
     /* mbedtls_cipher_init() */
     TEST_VALID_PARAM( mbedtls_cipher_init( &valid_ctx ) );
     TEST_INVALID_PARAM( mbedtls_cipher_init( NULL ) );