diff --git a/backend/tests/integration/test_pypi_proxy.py b/backend/tests/integration/test_pypi_proxy.py
index 5a08c16..e3f63fe 100644
--- a/backend/tests/integration/test_pypi_proxy.py
+++ b/backend/tests/integration/test_pypi_proxy.py
@@ -1,7 +1,6 @@
 """Integration tests for PyPI transparent proxy."""
 
 import pytest
-import httpx
 
 
 class TestPyPIProxyEndpoints:
@@ -11,30 +10,26 @@ class TestPyPIProxyEndpoints:
     """
 
     @pytest.mark.integration
-    def test_pypi_simple_index_no_sources(self):
+    def test_pypi_simple_index_no_sources(self, unauthenticated_client):
         """Test that /pypi/simple/ returns 503 when no sources configured."""
-        # Use unauthenticated client since PyPI proxy is public
-        with httpx.Client(base_url="http://localhost:8080") as client:
-            response = client.get("/pypi/simple/")
-            # Should return 503 when no PyPI upstream sources are configured
-            assert response.status_code == 503
-            assert "No PyPI upstream sources configured" in response.json()["detail"]
+        response = unauthenticated_client.get("/pypi/simple/")
+        # Should return 503 when no PyPI upstream sources are configured
+        assert response.status_code == 503
+        assert "No PyPI upstream sources configured" in response.json()["detail"]
 
     @pytest.mark.integration
-    def test_pypi_package_no_sources(self):
+    def test_pypi_package_no_sources(self, unauthenticated_client):
         """Test that /pypi/simple/{package}/ returns 503 when no sources configured."""
-        with httpx.Client(base_url="http://localhost:8080") as client:
-            response = client.get("/pypi/simple/requests/")
-            assert response.status_code == 503
-            assert "No PyPI upstream sources configured" in response.json()["detail"]
+        response = unauthenticated_client.get("/pypi/simple/requests/")
+        assert response.status_code == 503
+        assert "No PyPI upstream sources configured" in response.json()["detail"]
 
     @pytest.mark.integration
-    def test_pypi_download_missing_upstream_param(self):
+    def test_pypi_download_missing_upstream_param(self, unauthenticated_client):
         """Test that /pypi/simple/{package}/{filename} requires upstream param."""
-        with httpx.Client(base_url="http://localhost:8080") as client:
-            response = client.get("/pypi/simple/requests/requests-2.31.0.tar.gz")
-            assert response.status_code == 400
-            assert "upstream" in response.json()["detail"].lower()
+        response = unauthenticated_client.get("/pypi/simple/requests/requests-2.31.0.tar.gz")
+        assert response.status_code == 400
+        assert "upstream" in response.json()["detail"].lower()
 
 
 class TestPyPILinkRewriting:
@@ -69,20 +64,19 @@ class TestPyPIPackageNormalization:
     """Tests for PyPI package name normalization."""
 
     @pytest.mark.integration
-    def test_package_name_normalized(self):
+    def test_package_name_normalized(self, unauthenticated_client):
         """Test that package names are normalized per PEP 503."""
         # These should all be treated the same:
         # requests, Requests, requests_, requests-
         # The endpoint normalizes to lowercase with hyphens
 
-        with httpx.Client(base_url="http://localhost:8080") as client:
-            # Without upstream sources, we get 503, but the normalization
-            # happens before the source lookup
-            response = client.get("/pypi/simple/Requests/")
-            assert response.status_code == 503  # No sources, but path was valid
+        # Without upstream sources, we get 503, but the normalization
+        # happens before the source lookup
+        response = unauthenticated_client.get("/pypi/simple/Requests/")
+        assert response.status_code == 503  # No sources, but path was valid
 
-            response = client.get("/pypi/simple/some_package/")
-            assert response.status_code == 503
+        response = unauthenticated_client.get("/pypi/simple/some_package/")
+        assert response.status_code == 503
 
-            response = client.get("/pypi/simple/some-package/")
-            assert response.status_code == 503
+        response = unauthenticated_client.get("/pypi/simple/some-package/")
+        assert response.status_code == 503