diff --git a/.gitignore b/.gitignore
index a4c84a0e8..a6d890185 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,6 +48,8 @@ tests/e2e-aio/backends
 # tests/e2e/mock-backend/.gitignore covers the same binary; kept here too so
 # the artifact stays ignored if that scoped file is ever removed.
 /tests/e2e/mock-backend/mock-backend
+# The cloud-proxy backend binary the e2e suite runs next to the mock backend.
+/tests/e2e/mock-backend/cloud-proxy
 
 release/
 
diff --git a/tests/e2e/mock-backend/.gitignore b/tests/e2e/mock-backend/.gitignore
index 32923bce6..7df9e3a51 100644
--- a/tests/e2e/mock-backend/.gitignore
+++ b/tests/e2e/mock-backend/.gitignore
@@ -1 +1,2 @@
-mock-backend
\ No newline at end of file
+mock-backend
+cloud-proxy