Fix some dependencies in tests
diff --git a/tests/suites/test_suite_mpi.function b/tests/suites/test_suite_mpi.function
index 6a99a60..9bb5f0b 100644
--- a/tests/suites/test_suite_mpi.function
+++ b/tests/suites/test_suite_mpi.function
@@ -634,7 +634,7 @@
 }
 /* END_CASE */
 
-/* BEGIN_CASE */
+/* BEGIN_CASE depends_on:POLARSSL_GENPRIME */
 void mpi_is_prime( int radix_X, char *input_X, int div_result )
 {
     mpi X;