diff --git a/src/platform/test/cinema-main.c b/src/platform/test/cinema-main.c
index 2d1e470f7..9c004551f 100644
--- a/src/platform/test/cinema-main.c
+++ b/src/platform/test/cinema-main.c
@@ -226,6 +226,7 @@ void CIflush(struct StringBuilder* builder, FILE* out) {
 	builder->repeat = 0;
 	fputs(string, out);
 	free(string);
+	fflush(out);
 }
 
 static bool parseCInemaArgs(int argc, char* const* argv) {