diff --git a/test/integration/certificates.test.ts b/test/integration/certificates.test.ts
index 387d897..30fc1b4 100644
--- a/test/integration/certificates.test.ts
+++ b/test/integration/certificates.test.ts
@@ -198,7 +198,7 @@ test("the same order against a second authority: the catalogue's own certificate
 }, async () => {
   // The proxy that served the first test goes; its cache with it, or the certificate Pebble issued
   // would be served again and nothing would have been ordered here.
-  await must(`pkill -x mesh-route-proxy || true; sleep 1; mkdir -p ${ACME}/cache2`);
+  await must(`pkill -f '^/usr/local/bin/mesh-route-proxy' || true; sleep 1; mkdir -p ${ACME}/cache2`);
 
   // The catalogue's authority, as the catalogue runs it: ACME on, listening on its own port, a
   // root and an intermediate made at first start. It resolves the name through the machine's