diff --git a/contrib/pg_upgrade/Makefile b/contrib/pg_upgrade/Makefile
index 7f97b3d48451c9a0fbed05464a4f1c02cf17141e..63918625f4f3d595148047c56d90b699264ab576 100644
--- a/contrib/pg_upgrade/Makefile
+++ b/contrib/pg_upgrade/Makefile
@@ -25,7 +25,8 @@ endif
 check: test.sh
 	MAKE=$(MAKE) bindir=$(bindir) libdir=$(libdir) $(SHELL) $< --install
 
-installcheck: test.sh
-	MAKE=$(MAKE) bindir=$(bindir) libdir=$(libdir) $(SHELL) $<
+# disabled because it upsets the build farm
+#installcheck: test.sh
+#	MAKE=$(MAKE) bindir=$(bindir) libdir=$(libdir) $(SHELL) $<
 
 EXTRA_CLEAN = delete_old_cluster.sh log/ tmp_check/