diff --git a/changelog.d/5-internal/api-version-endpoint b/changelog.d/5-internal/api-version-endpoint
new file mode 100644
index 0000000000..600d93bd70
--- /dev/null
+++ b/changelog.d/5-internal/api-version-endpoint
@@ -0,0 +1 @@
+Add tests for additional information returned by `GET /api-version`
diff --git a/services/brig/src/Brig/User/API/Auth.hs b/services/brig/src/Brig/User/API/Auth.hs
index fdd67fd5fd..fac06ef4d3 100644
--- a/services/brig/src/Brig/User/API/Auth.hs
+++ b/services/brig/src/Brig/User/API/Auth.hs
@@ -61,6 +61,8 @@ import Wire.Swagger as Doc (pendingLoginError)
 
 routesPublic :: Routes Doc.ApiBuilder (Handler r) ()
 routesPublic = do
+  -- Note: this endpoint should always remain available at its unversioned
+  -- path, since the login cookie hardcodes @/access@ as a path.
   post "/access" (continue renewH) $
     accept "application" "json"
       .&. tokenRequest
diff --git a/services/brig/test/integration/API/Version.hs b/services/brig/test/integration/API/Version.hs
index eefdf7879c..f6914e2410 100644
--- a/services/brig/test/integration/API/Version.hs
+++ b/services/brig/test/integration/API/Version.hs
@@ -19,6 +19,7 @@ module API.Version (tests) where
 
 import Bilge
 import Bilge.Assert
+import Brig.Options
 import Imports
 import qualified Network.Wai.Utilities.Error as Wai
 import Test.Tasty
@@ -26,13 +27,14 @@ import Test.Tasty.HUnit
 import Util
 import Wire.API.Routes.Version
 
-tests :: Manager -> Brig -> TestTree
-tests p brig =
+tests :: Manager -> Opts -> Brig -> TestTree
+tests p opts brig =
   testGroup
     "version"
     [ test p "GET /api-version" $ testVersion brig,
       test p "GET /v1/api-version" $ testVersionV1 brig,
-      test p "GET /v500/api-version" $ testUnsupportedVersion brig
+      test p "GET /v500/api-version" $ testUnsupportedVersion brig,
+      test p "GET /api-version (federation info)" $ testFederationDomain opts brig
     ]
 
 testVersion :: Brig -> Http ()
@@ -57,3 +59,13 @@ testUnsupportedVersion brig = do
     responseJsonError =<< get (brig . path "/v500/api-version")
       <!! const 404 === statusCode
   liftIO $ Wai.label e @?= "unsupported-version"
+
+testFederationDomain :: Opts -> Brig -> Http ()
+testFederationDomain opts brig = do
+  let domain = setFederationDomain (optSettings opts)
+  vinfo <-
+    responseJsonError =<< get (brig . path "/api-version")
+      <!! const 200 === statusCode
+  liftIO $ do
+    vinfoFederation vinfo @?= True
+    vinfoDomain vinfo @?= domain
diff --git a/services/brig/test/integration/Main.hs b/services/brig/test/integration/Main.hs
index 275715a012..4dbeff8f31 100644
--- a/services/brig/test/integration/Main.hs
+++ b/services/brig/test/integration/Main.hs
@@ -141,7 +141,7 @@ runTests iConf brigOpts otherArgs = do
   includeFederationTests <- (== Just "1") <$> Blank.getEnv "INTEGRATION_FEDERATION_TESTS"
   internalApi <- API.Internal.tests brigOpts mg db b (brig iConf) gd g
 
-  let versionApi = API.Version.tests mg b
+  let versionApi = API.Version.tests mg brigOpts b
 
   let mlsApi = MLS.tests mg b brigOpts