diff --git a/tests/push-to-store.sh b/tests/push-to-store.sh
index d97eb095..6aadb916 100755
--- a/tests/push-to-store.sh
+++ b/tests/push-to-store.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 
 echo Pushing "$@" to "$REMOTE_STORE"
-echo -n "$OUT_PATHS" | xargs -d: nix copy --to "$REMOTE_STORE" --no-require-sigs
+printf "%s" "$OUT_PATHS" | xargs -d: nix copy --to "$REMOTE_STORE" --no-require-sigs