diff --git a/runtests.sh b/runtests.sh
index 99cc970..15fa202 100755
--- a/runtests.sh
+++ b/runtests.sh
@@ -4,4 +4,4 @@
 # If you are getting an INVOCATION ERROR for this script then there is 
 # a good chance you are running on Windows.
 # You can and should use WSL for running tox on Windows when it calls bash scripts.
-REQUESTS_CA_BUNDLE=`python -m pytest_httpbin.certs` py.test $*
+REQUESTS_CA_BUNDLE=`python -m pytest_httpbin.certs` pytest $*
diff --git a/vcr/stubs/httpx_stubs.py b/vcr/stubs/httpx_stubs.py
index a22502c..0a9fd0e 100644
--- a/vcr/stubs/httpx_stubs.py
+++ b/vcr/stubs/httpx_stubs.py
@@ -52,7 +52,6 @@ def _from_serialized_response(request, serialized_response, history=None):
     response = httpx.Response(
         status_code=serialized_response.get("status_code"),
         request=request,
-        http_version=serialized_response.get("http_version"),
         headers=_from_serialized_headers(serialized_response.get("headers")),
         content=content,
         history=history or [],