diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2e95bd05..f64b97a3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -13,12 +13,14 @@ image: fluiddyn/python3-stable:lastest
 
 validate_code:
   script:
-    # - pdm info
-    # - pdm info --env
-    - rm -rf ../unearth
-    - git clone https://github.com/paugier/unearth.git ../unearth
-    - pip install -e ../unearth --user
-    - python3.9 -c "from unearth import PackageFinder as F; f = F(index_urls=['https://pypi.org/simple/']); print(list(f.find_all_packages('flit-core')))"
+    - pip install requests
+    - python3.9 tmp_bug_unearth.py
+
+    # - rm -rf ../unearth
+    # - git clone https://github.com/paugier/unearth.git ../unearth
+    # - pip install -e ../unearth --user
+    # - python3.9 -c "from unearth import PackageFinder as F; f = F(index_urls=['https://pypi.org/simple/']); print(list(f.find_all_packages('flit-core')))"
+
     # - pdm install -G dev -v
     # - pdm run make lint
     # - pdm run make black_check
\ No newline at end of file
diff --git a/tmp_bug_unearth.py b/tmp_bug_unearth.py
new file mode 100644
index 00000000..b0f7c3bd
--- /dev/null
+++ b/tmp_bug_unearth.py
@@ -0,0 +1,24 @@
+from requests import Session
+
+session = Session()
+
+resp = session.get(
+    "https://pypi.org/simple/flit-core/",
+    headers={
+        "Accept": ", ".join(
+            [
+                "application/vnd.pypi.simple.v1+json",
+                "application/vnd.pypi.simple.v1+html; q=0.1",
+                "text/html; q=0.01",
+            ]
+        ),
+        # Don't cache the /simple/{package} page, to ensure it gets updated
+        # immediately when a new release is uploaded.
+        "Cache-Control": "max-age=0",
+    },
+    timeout=10,
+)
+
+print(resp.content[-400:])
+
+print(resp.json()["versions"])