From 8e0bfec791911f9db8703a5dea6da219d674f5c2 Mon Sep 17 00:00:00 2001
From: Matthias Maier <tamiko@43-1.org>
Date: Fri, 11 Feb 2022 17:47:09 -0600
Subject: [PATCH] bugfix

---
 cmake/scripts/run_test.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake/scripts/run_test.sh b/cmake/scripts/run_test.sh
index 1fe38f66e5..bb016c67db 100644
--- a/cmake/scripts/run_test.sh
+++ b/cmake/scripts/run_test.sh
@@ -53,7 +53,7 @@ case $STAGE in
     #    testsuite to explicitly set the number of threads in the header
     #    file tests.h.
     #
-    if [ "${TEST_N_THREADS+0}" -ne 0 ]; then
+    if [ "${TEST_N_THREADS:-0}" -ne 0 ]; then
       export DEAL_II_NUM_THREADS="${TEST_N_THREADS}"
       export TEST_N_THREADS
     fi
-- 
2.39.5