Fix premature fopen() call in mbedtls_entropy_write_seed_file #3175

Signed-off-by: Victor Krasnoshchok <ct3da21164@protonmail.ch>
diff --git a/tests/suites/test_suite_entropy.data b/tests/suites/test_suite_entropy.data
index 5cff399..3595c71 100644
--- a/tests/suites/test_suite_entropy.data
+++ b/tests/suites/test_suite_entropy.data
@@ -7,6 +7,9 @@
 Entropy write/update seed file
 entropy_seed_file:"no_such_dir/file":MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR
 
+Entropy write/update seed file: base NV seed file
+entropy_write_base_seed_file:0
+
 Entropy too many sources
 entropy_too_many_sources: