diff --git a/ghost/core/test/e2e-api/admin/__snapshots__/members-exporter.test.js.snap b/ghost/core/test/e2e-api/admin/__snapshots__/members-exporter.test.js.snap
index 7b589df10e..25e7262a36 100644
--- a/ghost/core/test/e2e-api/admin/__snapshots__/members-exporter.test.js.snap
+++ b/ghost/core/test/e2e-api/admin/__snapshots__/members-exporter.test.js.snap
@@ -5,7 +5,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -18,7 +18,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -31,7 +31,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -44,7 +44,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -57,7 +57,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -70,7 +70,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -83,7 +83,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -96,7 +96,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -109,7 +109,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -122,7 +122,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -135,7 +135,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -148,7 +148,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -161,7 +161,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -174,7 +174,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -187,7 +187,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -200,7 +200,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -213,7 +213,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -226,7 +226,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -239,7 +239,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -252,7 +252,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -265,7 +265,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -278,7 +278,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
diff --git a/ghost/core/test/e2e-api/admin/__snapshots__/members.test.js.snap b/ghost/core/test/e2e-api/admin/__snapshots__/members.test.js.snap
index 911073f6cf..04e54e6660 100644
--- a/ghost/core/test/e2e-api/admin/__snapshots__/members.test.js.snap
+++ b/ghost/core/test/e2e-api/admin/__snapshots__/members.test.js.snap
@@ -2106,7 +2106,7 @@ Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
   "content-disposition": Any<String>,
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "text/csv; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -3171,7 +3171,7 @@ exports[`Members API Can order by email_open_rate 2: [headers] 1`] = `
 Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "application/json; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
@@ -3368,7 +3368,7 @@ exports[`Members API Can order by email_open_rate 4: [headers] 1`] = `
 Object {
   "access-control-allow-origin": "http://127.0.0.1:2369",
   "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
-  "content-length": Any<String>,
+  "content-length": StringMatching /\\\\d\\+/,
   "content-type": "application/json; charset=utf-8",
   "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
   "vary": "Accept-Version, Origin, Accept-Encoding",
diff --git a/ghost/core/test/e2e-api/admin/explore.test.js b/ghost/core/test/e2e-api/admin/explore.test.js
index 8fbdb3ccc5..b875556246 100644
--- a/ghost/core/test/e2e-api/admin/explore.test.js
+++ b/ghost/core/test/e2e-api/admin/explore.test.js
@@ -1,5 +1,5 @@
 const {agentProvider, fixtureManager, matchers} = require('../../utils/e2e-framework');
-const {anyEtag, anyISODate, anyISODateTime, anyStringNumber, stringMatching, anyNumber} = matchers;
+const {anyEtag, anyISODate, anyISODateTime, anyContentLength, stringMatching, anyNumber} = matchers;
 
 describe('Explore API', function () {
     let agent;
@@ -33,7 +33,7 @@ describe('Explore API', function () {
                 .matchHeaderSnapshot({
                     etag: anyEtag,
                     // Special rule for this test, as the labs setting changes a lot
-                    'content-length': anyStringNumber
+                    'content-length': anyContentLength
                 });
         });
     });
diff --git a/ghost/core/test/e2e-api/admin/members-exporter.test.js b/ghost/core/test/e2e-api/admin/members-exporter.test.js
index 5246cbf1e9..ecd112d04c 100644
--- a/ghost/core/test/e2e-api/admin/members-exporter.test.js
+++ b/ghost/core/test/e2e-api/admin/members-exporter.test.js
@@ -1,5 +1,5 @@
 const {agentProvider, mockManager, fixtureManager, matchers} = require('../../utils/e2e-framework');
-const {anyEtag, anyString} = matchers;
+const {anyEtag, anyString, anyContentLength} = matchers;
 
 const uuid = require('uuid');
 const should = require('should');
@@ -47,7 +47,7 @@ async function testOutput(member, asserts, filters = []) {
             .expectEmptyBody()
             .matchHeaderSnapshot({
                 etag: anyEtag,
-                'content-length': anyString,
+                'content-length': anyContentLength,
                 'content-disposition': anyString
             });
 
diff --git a/ghost/core/test/e2e-api/admin/members.test.js b/ghost/core/test/e2e-api/admin/members.test.js
index 0a52cdca31..2fe545337d 100644
--- a/ghost/core/test/e2e-api/admin/members.test.js
+++ b/ghost/core/test/e2e-api/admin/members.test.js
@@ -1,5 +1,5 @@
 const {agentProvider, mockManager, fixtureManager, matchers} = require('../../utils/e2e-framework');
-const {anyEtag, anyObjectId, anyUuid, anyISODateTime, anyISODate, anyString, anyArray, anyLocationFor, anyErrorId, anyObject} = matchers;
+const {anyEtag, anyObjectId, anyUuid, anyISODateTime, anyISODate, anyString, anyArray, anyLocationFor, anyContentLength, anyErrorId, anyObject} = matchers;
 const ObjectId = require('bson-objectid');
 
 const assert = require('assert');
@@ -555,7 +555,7 @@ describe('Members API', function () {
             .expectStatus(200)
             .matchHeaderSnapshot({
                 etag: anyEtag,
-                'content-length': anyString
+                'content-length': anyContentLength
             })
             .matchBodySnapshot({
                 members: new Array(8).fill(memberMatcherShallowIncludes)
@@ -570,7 +570,7 @@ describe('Members API', function () {
             .expectStatus(200)
             .matchHeaderSnapshot({
                 etag: anyEtag,
-                'content-length': anyString
+                'content-length': anyContentLength
             })
             .matchBodySnapshot({
                 members: new Array(8).fill(memberMatcherShallowIncludes)
@@ -2016,7 +2016,7 @@ describe('Members API', function () {
             .expectEmptyBody() // express-test body parsing doesn't support CSV
             .matchHeaderSnapshot({
                 etag: anyEtag,
-                'content-length': anyString, //For some reason the content-length changes between 1220 and 1317
+                'content-length': anyContentLength,
                 'content-disposition': anyString
             });
 
diff --git a/ghost/core/test/e2e-api/admin/settings.test.js b/ghost/core/test/e2e-api/admin/settings.test.js
index 05f113c081..a69e12dfa9 100644
--- a/ghost/core/test/e2e-api/admin/settings.test.js
+++ b/ghost/core/test/e2e-api/admin/settings.test.js
@@ -3,7 +3,7 @@ const SingleUseTokenProvider = require('../../../core/server/services/members/Si
 const settingsService = require('../../../core/server/services/settings/settings-service');
 const settingsCache = require('../../../core/shared/settings-cache');
 const {agentProvider, fixtureManager, mockManager, matchers} = require('../../utils/e2e-framework');
-const {stringMatching, anyEtag, anyUuid, anyStringNumber} = matchers;
+const {stringMatching, anyEtag, anyUuid, anyContentLength} = matchers;
 const models = require('../../../core/server/models');
 const {anyErrorId} = matchers;
 
@@ -65,7 +65,7 @@ describe('Settings API', function () {
                 .matchHeaderSnapshot({
                     etag: anyEtag,
                     // Special rule for this test, as the labs setting changes a lot
-                    'content-length': anyStringNumber
+                    'content-length': anyContentLength
                 });
         });
 
@@ -201,7 +201,7 @@ describe('Settings API', function () {
                 .matchHeaderSnapshot({
                     etag: anyEtag,
                     // Special rule for this test, as the labs setting changes a lot
-                    'content-length': anyStringNumber
+                    'content-length': anyContentLength
                 });
 
             // Check returned WITH prefix
@@ -228,7 +228,7 @@ describe('Settings API', function () {
                 .matchHeaderSnapshot({
                     etag: anyEtag,
                     // Special rule for this test, as the labs setting changes a lot
-                    'content-length': anyStringNumber
+                    'content-length': anyContentLength
                 })
                 .expect(({body}) => {
                     const emailVerificationRequired = body.settings.find(setting => setting.key === 'email_verification_required');
@@ -249,7 +249,7 @@ describe('Settings API', function () {
                 .matchHeaderSnapshot({
                     etag: anyEtag,
                     // Special rule for this test, as the labs setting changes a lot
-                    'content-length': anyStringNumber
+                    'content-length': anyContentLength
                 })
                 .expect(({body}) => {
                     const membersSupportAddress = body.settings.find(setting => setting.key === 'members_support_address');
@@ -284,7 +284,7 @@ describe('Settings API', function () {
                 .matchHeaderSnapshot({
                     etag: anyEtag,
                     // Special rule for this test, as the labs setting changes a lot
-                    'content-length': anyStringNumber
+                    'content-length': anyContentLength
                 })
                 .expect(({body}) => {
                     const membersSupportAddress = body.settings.find(setting => setting.key === 'members_support_address');
@@ -311,7 +311,7 @@ describe('Settings API', function () {
                 .matchHeaderSnapshot({
                     etag: anyEtag,
                     // Special rule for this test, as the labs setting changes a lot
-                    'content-length': anyStringNumber
+                    'content-length': anyContentLength
                 })
                 .expect(({body}) => {
                     const membersSupportAddress = body.settings.find(setting => setting.key === 'members_support_address');