--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -437324,57 +437324,57 @@
    "55c94363465c252a3c24622a56020a8981e01f8e",
    "testharness"
   ],
   "content-security-policy/reporting-api/reporting-api-doesnt-send-reports-without-violation.https.sub.html": [
    "7be3a72eb885841e8ccb674eeae3761f638adf2c",
    "testharness"
   ],
   "content-security-policy/reporting-api/reporting-api-doesnt-send-reports-without-violation.https.sub.html.sub.headers": [
-   "65081c84f2f9a69ae0d9407e7ce7ec1d2aff9e2f",
+   "e02c27c5d75e315e787ca0923ccdf9b8bfdc95a7",
    "support"
   ],
   "content-security-policy/reporting-api/reporting-api-report-only-sends-reports-on-violation.https.sub.html": [
    "19e6a43463fb72a74a0a03e2515d564f2df49234",
    "testharness"
   ],
   "content-security-policy/reporting-api/reporting-api-report-only-sends-reports-on-violation.https.sub.html.sub.headers": [
-   "6f50f9873944cd8a050eee7ff86c1c5c79f837a6",
+   "21a26cf60992dea5dc9b8f6d134559a32a69efbc",
    "support"
   ],
   "content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-1.https.sub.html": [
    "08311936720a8ee3835d029f572e924dd4f45e6e",
    "testharness"
   ],
   "content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-1.https.sub.html.sub.headers": [
-   "098e7ecf9e4b22af2526b97bc21837630074ab52",
+   "4bddc6a5f54193b57e91b0ed981797849cd72b62",
    "support"
   ],
   "content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-2.https.sub.html": [
    "41f777a06556d6cb4d8110d4d1fe70a6e58c2709",
    "testharness"
   ],
   "content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-2.https.sub.html.sub.headers": [
-   "80b6e9e46d32fdf4add93ff104d4d8de2f15b292",
+   "694161355a5dd2e24ca94f98ca98ce073cd82537",
    "support"
   ],
   "content-security-policy/reporting-api/reporting-api-sends-reports-on-violation.https.sub.html": [
    "131b261ef9a6b79714eeacd4c9a525bdfafab21c",
    "testharness"
   ],
   "content-security-policy/reporting-api/reporting-api-sends-reports-on-violation.https.sub.html.sub.headers": [
-   "2fac5fdd70da5df3b6778dde3865c7d348541f63",
+   "766bb03f5fc72d58cb67309cbbb18a8da74b6aec",
    "support"
   ],
   "content-security-policy/reporting-api/reporting-api-works-on-frame-src.https.sub.html": [
    "1475964f0393ad3833c0024153236e5480ee33fd",
    "testharness"
   ],
   "content-security-policy/reporting-api/reporting-api-works-on-frame-src.https.sub.html.sub.headers": [
-   "bbd38e08374180c8c9469d1b62f75b864c77862f",
+   "b590a452008e8c32c2758dd36be9fa46c5cbc37f",
    "support"
   ],
   "content-security-policy/reporting/multiple-report-policies.html": [
    "f639d91d9603d3f69e76e0e674502c3377feac1e",
    "testharness"
   ],
   "content-security-policy/reporting/multiple-report-policies.html.sub.headers": [
    "4b6be6be32411907eadd77377882dffa4f0835a7",

--- a/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-doesnt-send-reports-without-violation.https.sub.html.sub.headers
+++ b/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-doesnt-send-reports-without-violation.https.sub.html.sub.headers
@@ -1,7 +1,7 @@
 Expires: Mon, 26 Jul 1997 05:00:00 GMT
 Cache-Control: no-store, no-cache, must-revalidate
 Cache-Control: post-check=0, pre-check=0, false
 Pragma: no-cache
 Set-Cookie: reporting-api-doesnt-send-reports-without-violation={{$id:uuid()}}; Path=/content-security-policy/reporting-api
-Report-To: { "group": "csp-group", "max-age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
+Report-To: { "group": "csp-group", "max_age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
 Content-Security-Policy: script-src 'self' 'unsafe-inline'; img-src 'self'; report-to csp-group

--- a/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-report-only-sends-reports-on-violation.https.sub.html.sub.headers
+++ b/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-report-only-sends-reports-on-violation.https.sub.html.sub.headers
@@ -1,7 +1,7 @@
 Expires: Mon, 26 Jul 1997 05:00:00 GMT
 Cache-Control: no-store, no-cache, must-revalidate
 Cache-Control: post-check=0, pre-check=0, false
 Pragma: no-cache
 Set-Cookie: reporting-api-report-only-sends-reports-on-violation={{$id:uuid()}}; Path=/content-security-policy/reporting-api
-Report-To: { "group": "csp-group", "max-age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
+Report-To: { "group": "csp-group", "max_age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
 Content-Security-Policy-Report-Only: script-src 'self' 'unsafe-inline'; img-src 'none'; report-to csp-group

--- a/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-1.https.sub.html.sub.headers
+++ b/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-1.https.sub.html.sub.headers
@@ -1,7 +1,7 @@
 Expires: Mon, 26 Jul 1997 05:00:00 GMT
 Cache-Control: no-store, no-cache, must-revalidate
 Cache-Control: post-check=0, pre-check=0, false
 Pragma: no-cache
 Set-Cookie: reporting-api-report-to-overrides-report-uri-1={{$id:uuid()}}; Path=/content-security-policy/reporting-api
 Content-Security-Policy: script-src 'self' 'unsafe-inline'; img-src 'none'; report-uri "/content-security-policy/support/report.py?op=put&reportID={{$id}}"; report-to csp-group
-Report-To: { "group": "csp-group", "max-age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id:uuid()}}" }] }
+Report-To: { "group": "csp-group", "max_age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id:uuid()}}" }] }

--- a/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-2.https.sub.html.sub.headers
+++ b/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-report-to-overrides-report-uri-2.https.sub.html.sub.headers
@@ -1,7 +1,7 @@
 Expires: Mon, 26 Jul 1997 05:00:00 GMT
 Cache-Control: no-store, no-cache, must-revalidate
 Cache-Control: post-check=0, pre-check=0, false
 Pragma: no-cache
 Set-Cookie: reporting-api-report-to-overrides-report-uri-2={{$id:uuid()}}; Path=/content-security-policy/reporting-api
 Content-Security-Policy: script-src 'self' 'unsafe-inline'; img-src 'none'; report-to csp-group; report-uri "/content-security-policy/support/report.py?op=put&reportID={{$id}}"
-Report-To: { "group": "csp-group", "max-age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id:uuid()}}" }] }
+Report-To: { "group": "csp-group", "max_age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id:uuid()}}" }] }

--- a/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-sends-reports-on-violation.https.sub.html.sub.headers
+++ b/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-sends-reports-on-violation.https.sub.html.sub.headers
@@ -1,7 +1,7 @@
 Expires: Mon, 26 Jul 1997 05:00:00 GMT
 Cache-Control: no-store, no-cache, must-revalidate
 Cache-Control: post-check=0, pre-check=0, false
 Pragma: no-cache
 Set-Cookie: reporting-api-sends-reports-on-violation={{$id:uuid()}}; Path=/content-security-policy/reporting-api
-Report-To: { "group": "csp-group", "max-age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
+Report-To: { "group": "csp-group", "max_age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
 Content-Security-Policy: script-src 'self' 'unsafe-inline'; img-src 'none'; report-to csp-group

--- a/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-works-on-frame-src.https.sub.html.sub.headers
+++ b/testing/web-platform/tests/content-security-policy/reporting-api/reporting-api-works-on-frame-src.https.sub.html.sub.headers
@@ -1,6 +1,6 @@
 Expires: Mon, 26 Jul 1997 05:00:00 GMT
 Cache-Control: no-store, no-cache, must-revalidate
 Pragma: no-cache
 Set-Cookie: reporting-api-works-on-frame-src={{$id:uuid()}}; Path=/content-security-policy/reporting-api
-Report-To: { "group": "csp-group", "max-age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
+Report-To: { "group": "csp-group", "max_age": 10886400, "endpoints": [{ "url": "https://{{host}}:{{ports[https][0]}}/content-security-policy/support/report.py?op=put&reportID={{$id}}" }] }
 Content-Security-Policy: script-src 'self' 'unsafe-inline'; frame-src 'none'; report-to csp-group