diff --git a/tests/create_compress_files.c b/tests/create_compress_files.c
index 44367d8f..bd5b4ef4 100644
--- a/tests/create_compress_files.c
+++ b/tests/create_compress_files.c
@@ -79,7 +79,8 @@ static void
 write_abc(FILE *file)
 {
 	for (size_t i = 0; i < 12345; ++i)
-		fwrite("abc\n", 4, 1, file);
+		if (fwrite("abc\n", 4, 1, file) != 1)
+			exit(1);
 }