diff --git a/pkgs/development/python-modules/openapi-core/default.nix b/pkgs/development/python-modules/openapi-core/default.nix
index 81fb76e51861..81b42d959021 100644
--- a/pkgs/development/python-modules/openapi-core/default.nix
+++ b/pkgs/development/python-modules/openapi-core/default.nix
@@ -85,6 +85,12 @@ buildPythonPackage rec {
   ]
   ++ lib.concatAttrValues optional-dependencies;
 
+  pytestFlags = [
+    "-Wignore::pytest.PytestRemovedIn10Warning"
+    # Using `httpx` with `starlette.testclient` is deprecated; install `httpx2` instead.
+    "-Wignore::starlette.exceptions.StarletteDeprecationWarning"
+  ];
+
   disabledTestPaths = [
     # Requires secrets and additional configuration
     "tests/integration/contrib/django/"