Allow comments in test data files
diff --git a/tests/suites/test_suite_md.data b/tests/suites/test_suite_md.data
index 71d1f6d..abd8e55 100644
--- a/tests/suites/test_suite_md.data
+++ b/tests/suites/test_suite_md.data
@@ -1,3 +1,4 @@
+# Tests of the generic message digest interface
 MD process
 mbedtls_md_process: