diff --git a/debian/tests/installcheck b/debian/tests/installcheck
index 2b12ed9..e592cd0 100755
--- a/debian/tests/installcheck
+++ b/debian/tests/installcheck
@@ -5,13 +5,7 @@
 
 set -e
 for v in $(pg_buildext supported-versions); do
-	case $v in
-		# older versions fail on concat, ignore that
-		# ERROR:  function concat(unknown, unknown) does not exist
-		8*|9.0) FAIL="true" ;;
-		*) FAIL="false" ;;
-	esac
-	rm -f orafunc.sql
+	rm -f orafunc.sql.in orafunc.sql
 	make orafunc.sql PG_CONFIG=/usr/lib/postgresql/$v/bin/pg_config
-	pg_buildext installcheck-$v || $FAIL
+	pg_buildext installcheck-$v
 done