1 files changed, 4 insertions, 2 deletions
diff --git a/test/test_reader_writer.c b/test/test_reader_writer.c
index bebda449..7302fa39 100644
--- a/test/test_reader_writer.c
+++ b/test/test_reader_writer.c
@@ -146,10 +146,12 @@ test_write_errors(void)
 static void
 test_writer(const char* const path)
 {
-  FILE*    fd  = fopen(path, "wb");
-  SerdEnv* env = serd_env_new(NULL);
+  FILE* const fd = fopen(path, "wb");
   assert(fd);
 
+  SerdEnv* const env = serd_env_new(NULL);
+  assert(env);
+
   SerdWriter* writer =
     serd_writer_new(SERD_TURTLE, (SerdStyle)0, env, NULL, serd_file_sink, fd);
   assert(writer);