diff --git a/src/test/modules/libpq_pipeline/libpq_pipeline.c b/src/test/modules/libpq_pipeline/libpq_pipeline.c
index c27c4e0ada..8f6f2d4b4b 100644
--- a/src/test/modules/libpq_pipeline/libpq_pipeline.c
+++ b/src/test/modules/libpq_pipeline/libpq_pipeline.c
@@ -1630,7 +1630,10 @@ main(int argc, char **argv)
 	/* Set the trace file, if requested */
 	if (tracefile != NULL)
 	{
-		trace = fopen(tracefile, "w");
+		if (strcmp(tracefile, "-") == 0)
+			trace = stdout;
+		else
+			trace = fopen(tracefile, "w");
 		if (trace == NULL)
 			pg_fatal("could not open file \"%s\": %m", tracefile);
 
-- 
2.30.2