diff --git a/testing/web-platform/meta/MANIFEST.json b/testing/web-platform/meta/MANIFEST.json
index 177171d31a46..4ef43752cb42 100644
--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -43419,6 +43419,16 @@
      {}
     ]
    ],
+   "fetch/api/policies/nested-policy.js": [
+    [
+     {}
+    ]
+   ],
+   "fetch/api/policies/nested-policy.js.headers": [
+    [
+     {}
+    ]
+   ],
    "fetch/api/policies/referrer-no-referrer.html.headers": [
     [
      {}
@@ -163674,6 +163684,14 @@
    "94dc6f63015b0835eb2a8c1892636bafeb1dfee7",
    "support"
   ],
+  "fetch/api/policies/nested-policy.js": [
+   "57cfc2060102695b601209e4927861aaee377c4e",
+   "support"
+  ],
+  "fetch/api/policies/nested-policy.js.headers": [
+   "fab90d344cbb78bad6445288c418b87736a830ae",
+   "support"
+  ],
   "fetch/api/policies/referrer-no-referrer-worker.html": [
    "cc9274c1b182a487dbe945e6d8754a671d78e3c4",
    "testharness"
@@ -163707,7 +163725,7 @@
    "support"
   ],
   "fetch/api/policies/referrer-origin-when-cross-origin.js": [
-   "e750c643dda40176e230d39e38057d4d2bda4fcf",
+   "f6b25aad46ba48422fab737582e82179666b5233",
    "support"
   ],
   "fetch/api/policies/referrer-origin-when-cross-origin.js.headers": [
@@ -163727,7 +163745,7 @@
    "support"
   ],
   "fetch/api/policies/referrer-origin.js": [
-   "368af4830da8fcd341ffb513b8c6c2c2bcfab3d9",
+   "8d8b58a4d5046e55e6bd97289cf6e515614e9577",
    "support"
   ],
   "fetch/api/policies/referrer-origin.js.headers": [
@@ -163747,7 +163765,7 @@
    "support"
   ],
   "fetch/api/policies/referrer-unsafe-url.js": [
-   "24d042ef4e85cccf3d178f701af5664c954deaf3",
+   "e1881c5f3f0a7d1705a5d2eb5d3381d8788374d8",
    "support"
   ],
   "fetch/api/policies/referrer-unsafe-url.js.headers": [
diff --git a/testing/web-platform/tests/fetch/api/policies/nested-policy.js b/testing/web-platform/tests/fetch/api/policies/nested-policy.js
new file mode 100644
index 000000000000..b0d17696c337
--- /dev/null
+++ b/testing/web-platform/tests/fetch/api/policies/nested-policy.js
@@ -0,0 +1 @@
+// empty, but referrer-policy set on this file
diff --git a/testing/web-platform/tests/fetch/api/policies/nested-policy.js.headers b/testing/web-platform/tests/fetch/api/policies/nested-policy.js.headers
new file mode 100644
index 000000000000..7ffbf17d6be5
--- /dev/null
+++ b/testing/web-platform/tests/fetch/api/policies/nested-policy.js.headers
@@ -0,0 +1 @@
+Referrer-Policy: no-referrer
diff --git a/testing/web-platform/tests/fetch/api/policies/referrer-origin-when-cross-origin.js b/testing/web-platform/tests/fetch/api/policies/referrer-origin-when-cross-origin.js
index 2baf7d12593f..b9e6b1fbe259 100644
--- a/testing/web-platform/tests/fetch/api/policies/referrer-origin-when-cross-origin.js
+++ b/testing/web-platform/tests/fetch/api/policies/referrer-origin-when-cross-origin.js
@@ -1,6 +1,10 @@
 if (this.document === undefined) {
   importScripts("/resources/testharness.js");
   importScripts("../resources/utils.js");
+
+  // A nested importScripts() with a referrer-policy should have no effect
+  // on overall worker policy.
+  importScripts("nested-policy.js");
 }
 
 var referrerOrigin = "http://{{host}}:{{ports[http][0]}}/";
diff --git a/testing/web-platform/tests/fetch/api/policies/referrer-origin.js b/testing/web-platform/tests/fetch/api/policies/referrer-origin.js
index de187657486d..596ff818ca34 100644
--- a/testing/web-platform/tests/fetch/api/policies/referrer-origin.js
+++ b/testing/web-platform/tests/fetch/api/policies/referrer-origin.js
@@ -1,6 +1,10 @@
 if (this.document === undefined) {
   importScripts("/resources/testharness.js");
   importScripts("../resources/utils.js");
+
+  // A nested importScripts() with a referrer-policy should have no effect
+  // on overall worker policy.
+  importScripts("nested-policy.js");
 }
 
 var referrerOrigin = "http://{{host}}:{{ports[http][0]}}/";
diff --git a/testing/web-platform/tests/fetch/api/policies/referrer-unsafe-url.js b/testing/web-platform/tests/fetch/api/policies/referrer-unsafe-url.js
index b593fad5aa2b..4d61172613ee 100644
--- a/testing/web-platform/tests/fetch/api/policies/referrer-unsafe-url.js
+++ b/testing/web-platform/tests/fetch/api/policies/referrer-unsafe-url.js
@@ -1,6 +1,10 @@
 if (this.document === undefined) {
   importScripts("/resources/testharness.js");
   importScripts("../resources/utils.js");
+
+  // A nested importScripts() with a referrer-policy should have no effect
+  // on overall worker policy.
+  importScripts("nested-policy.js");
 }
 
 var referrerUrl = location.href;