--- a/browser/components/preferences/in-content/tests/browser_contentblocking.js
+++ b/browser/components/preferences/in-content/tests/browser_contentblocking.js
@@ -461,16 +461,22 @@ add_task(async function testPolicyCatego
   let standardRadioOption = doc.getElementById("standardRadio");
   is(strictRadioOption.disabled, true, "the strict option is disabled");
   is(standardRadioOption.disabled, true, "the standard option is disabled");
 
   gBrowser.removeCurrentTab();
 
   // Cleanup after this particular test.
   if (Services.policies.status != Ci.nsIEnterprisePolicies.INACTIVE) {
+    await EnterprisePolicyTesting.setupPolicyEngineWithJson({
+      policies: {"Cookies": {
+	  "Locked": false,
+	},
+      },
+    });
     await EnterprisePolicyTesting.setupPolicyEngineWithJson("");
   }
   is(Services.policies.status, Ci.nsIEnterprisePolicies.INACTIVE, "Engine is inactive at the end of the test");
 
   EnterprisePolicyTesting.resetRunOnceState();
   PoliciesPrefTracker.stop();
 });