diff --git a/tests/_collect_data.pm b/tests/_collect_data.pm
index f09d481d..51a03b52 100644
--- a/tests/_collect_data.pm
+++ b/tests/_collect_data.pm
@@ -15,7 +15,7 @@ sub run {
     upload_logs '/var/tmp/free.log';
     assert_script_run 'df > /var/tmp/df.log';
     upload_logs '/var/tmp/df.log';
-    assert_script_run 'systemctl -t service --no-pager --no-legend | grep -o ".*\.service" > /var/tmp/services.log';
+    assert_script_run 'systemctl -t service --no-pager --no-legend | grep -o "[[:graph:]]*\.service" > /var/tmp/services.log';
     upload_logs '/var/tmp/services.log';
 }