diff --git a/packages/e2e-tests/README.md b/packages/e2e-tests/README.md
index 1917c3710e54..541257eb2410 100644
--- a/packages/e2e-tests/README.md
+++ b/packages/e2e-tests/README.md
@@ -49,8 +49,8 @@ mkdir test-applications/my-new-test-application # Name of the new folder doesn't
 
 # Create an npm configuration file that uses the fake test registry
 cat > test-applications/my-new-test-application/.npmrc << EOF
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
 EOF
 ```
 
@@ -60,7 +60,7 @@ Add the new test app to `test-application` matrix in `.github/workflows/build.ym
 want to run a canary test, add it to the `canary.yml` workflow.
 
 **An important thing to note:** In the context of the build/test commands the fake test registry is available at
-`http://localhost:4873`. It hosts all of our packages as if they were to be published with the state of the current
+`http://127.0.0.1:4873`. It hosts all of our packages as if they were to be published with the state of the current
 branch. This means we can install the packages from this registry via the `.npmrc` configuration as seen above. If you
 add Sentry dependencies to your test application, you should set the dependency versions set to `latest || *` in order
 for it to work with both regular and prerelease versions:
diff --git a/packages/e2e-tests/test-applications/create-next-app/.npmrc b/packages/e2e-tests/test-applications/create-next-app/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/create-next-app/.npmrc
+++ b/packages/e2e-tests/test-applications/create-next-app/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/create-react-app/.npmrc b/packages/e2e-tests/test-applications/create-react-app/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/create-react-app/.npmrc
+++ b/packages/e2e-tests/test-applications/create-react-app/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/create-remix-app-v2/.npmrc b/packages/e2e-tests/test-applications/create-remix-app-v2/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/create-remix-app-v2/.npmrc
+++ b/packages/e2e-tests/test-applications/create-remix-app-v2/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/create-remix-app/.npmrc b/packages/e2e-tests/test-applications/create-remix-app/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/create-remix-app/.npmrc
+++ b/packages/e2e-tests/test-applications/create-remix-app/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/debug-id-sourcemaps/.npmrc b/packages/e2e-tests/test-applications/debug-id-sourcemaps/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/debug-id-sourcemaps/.npmrc
+++ b/packages/e2e-tests/test-applications/debug-id-sourcemaps/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/generic-ts3.8/.npmrc b/packages/e2e-tests/test-applications/generic-ts3.8/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/generic-ts3.8/.npmrc
+++ b/packages/e2e-tests/test-applications/generic-ts3.8/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/nextjs-app-dir/.npmrc b/packages/e2e-tests/test-applications/nextjs-app-dir/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/nextjs-app-dir/.npmrc
+++ b/packages/e2e-tests/test-applications/nextjs-app-dir/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/node-experimental-fastify-app/.npmrc b/packages/e2e-tests/test-applications/node-experimental-fastify-app/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/node-experimental-fastify-app/.npmrc
+++ b/packages/e2e-tests/test-applications/node-experimental-fastify-app/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/node-express-app/.npmrc b/packages/e2e-tests/test-applications/node-express-app/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/node-express-app/.npmrc
+++ b/packages/e2e-tests/test-applications/node-express-app/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/react-create-hash-router/.npmrc b/packages/e2e-tests/test-applications/react-create-hash-router/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/react-create-hash-router/.npmrc
+++ b/packages/e2e-tests/test-applications/react-create-hash-router/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/react-router-6-use-routes/.npmrc b/packages/e2e-tests/test-applications/react-router-6-use-routes/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/react-router-6-use-routes/.npmrc
+++ b/packages/e2e-tests/test-applications/react-router-6-use-routes/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/.npmrc b/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/.npmrc
+++ b/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/standard-frontend-react/.npmrc b/packages/e2e-tests/test-applications/standard-frontend-react/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/standard-frontend-react/.npmrc
+++ b/packages/e2e-tests/test-applications/standard-frontend-react/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-applications/sveltekit/.npmrc b/packages/e2e-tests/test-applications/sveltekit/.npmrc
index c6b3ef9b3eaa..070f80f05092 100644
--- a/packages/e2e-tests/test-applications/sveltekit/.npmrc
+++ b/packages/e2e-tests/test-applications/sveltekit/.npmrc
@@ -1,2 +1,2 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
diff --git a/packages/e2e-tests/test-registry.npmrc b/packages/e2e-tests/test-registry.npmrc
index fd8ba6605a28..97b9627a1642 100644
--- a/packages/e2e-tests/test-registry.npmrc
+++ b/packages/e2e-tests/test-registry.npmrc
@@ -1,6 +1,6 @@
-@sentry:registry=http://localhost:4873
-@sentry-internal:registry=http://localhost:4873
-//localhost:4873/:_authToken=some-token
+@sentry:registry=http://127.0.0.1:4873
+@sentry-internal:registry=http://127.0.0.1:4873
+//127.0.0.1:4873/:_authToken=some-token
 
 # Do not notify about npm updates
 update-notifier=false