diff --git a/newsfragments/2327.bugfix.rst b/newsfragments/2327.bugfix.rst
new file mode 100644
index 0000000000..bac3de984b
--- /dev/null
+++ b/newsfragments/2327.bugfix.rst
@@ -0,0 +1 @@
+The exception retry middleware whitelist was missing a comma between ``txpool`` and ``testing``
diff --git a/web3/middleware/exception_retry_request.py b/web3/middleware/exception_retry_request.py
index 3a7192abf7..3289189d5a 100644
--- a/web3/middleware/exception_retry_request.py
+++ b/web3/middleware/exception_retry_request.py
@@ -25,7 +25,7 @@
     'admin',
     'miner',
     'net',
-    'txpool'
+    'txpool',
     'testing',
     'evm',
     'eth_protocolVersion',