diff --git a/backend/scripts/p11-acceptance.mjs b/backend/scripts/p11-acceptance.mjs
index e5679de5..686a2c4f 100644
--- a/backend/scripts/p11-acceptance.mjs
+++ b/backend/scripts/p11-acceptance.mjs
@@ -845,6 +845,11 @@ async function setupContext({ repositoryRoot = defaultRepositoryRoot, env = proc
 
 export async function runIntegration({ repositoryRoot = defaultRepositoryRoot, keep = false, env = process.env, announce } = {}) {
   const ctx = await setupContext({ repositoryRoot, env });
+  const priorEnv = {};
+  for (const [key, value] of Object.entries(ctx.env)) {
+    priorEnv[key] = process.env[key];
+    process.env[key] = value;
+  }
   let success = false;
   try {
     const checks = await productionChecks(ctx);
@@ -864,6 +869,10 @@ export async function runIntegration({ repositoryRoot = defaultRepositoryRoot, k
     return { exitCode: success ? 0 : 1, runRoot: ctx.run.root, retained: !(await finalizeOwnedRun({ run: ctx.run, success, keep })) };
   } finally {
     await stopBackend(ctx).catch(() => {});
+    for (const [key, value] of Object.entries(ctx.env)) {
+      if (priorEnv[key] === undefined) delete process.env[key];
+      else process.env[key] = priorEnv[key];
+    }
   }
 }