diff --git a/debian/tests/testsuite.xsession b/debian/tests/testsuite.xsession
index e2244b1..87eb09c 100755
--- a/debian/tests/testsuite.xsession
+++ b/debian/tests/testsuite.xsession
@@ -3,4 +3,4 @@
 export LC_ALL=C.UTF-8
 openbox &
 sleep 1
-dh_auto_test
+dh_auto_test --no-parallel