diff --git a/test/units/testsuite-15.sh b/test/units/testsuite-15.sh
index 3c3dbefa68..2f80cf2564 100755
--- a/test/units/testsuite-15.sh
+++ b/test/units/testsuite-15.sh
@@ -337,6 +337,9 @@ test_transient_slice_dropins () {
     echo -e '[Unit]\nDocumentation=man:drop3' >/etc/systemd/system/a-b-.slice.d/drop3.conf
     echo -e '[Unit]\nDocumentation=man:drop4' >/etc/systemd/system/a-b-c.slice.d/drop4.conf
 
+    # Invoke daemon-reload to make sure that the call below doesn't fail
+    systemctl daemon-reload
+
     # No fragment is required, so this works
     systemctl cat a-b-c.slice