diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4160f6..f459bdb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,12 +1,12 @@
 # Changelog
 
+## [Unreleased][]
+
 ### Added
 
 * MSK probes `chaosaws.msk.probes.describe_msk_cluster`  `chaosaws.msk.probes.get_bootstrap_servers`
 * MSK actions `chaosaws.msk.actions.reboot_msk_broker`  `chaosaws.msk.actions.delete_cluster`
 
-## [Unreleased][]
-
 [Unreleased]: https://github.com/chaostoolkit-incubator/chaostoolkit-aws/compare/0.33.0...HEAD
 
 ## [0.33.0][] - 2024-02-26
diff --git a/chaosaws/msk/actions.py b/chaosaws/msk/actions.py
index 2443fbf..a6432b5 100644
--- a/chaosaws/msk/actions.py
+++ b/chaosaws/msk/actions.py
@@ -2,6 +2,7 @@
 
 from chaoslib.types import Configuration, Secrets
 from chaoslib.exceptions import FailedActivity
+
 from chaosaws import aws_client, get_logger
 from chaosaws.types import AWSResponse
 
@@ -28,8 +29,8 @@ def reboot_msk_broker(
             ClusterArn=cluster_arn,
             BrokerIds=broker_ids
         )
-    except client.exceptions.NotFoundException as e:
-        raise FailedActivity("The specified cluster was not found") from e
+    except client.exceptions.NotFoundException:
+        raise FailedActivity(f"The specified cluster was not found" )
 
 
 def delete_cluster(
@@ -44,5 +45,5 @@ def delete_cluster(
     logger.debug(f"Deleting MSK cluster: {cluster_arn}")
     try:
         return client.delete_cluster(ClusterArn=cluster_arn)
-    except client.exceptions.NotFoundException as e:
-        raise FailedActivity("The specified cluster was not found") from e
\ No newline at end of file
+    except client.exceptions.NotFoundException:
+        raise FailedActivity(f"The specified cluster was not found")
\ No newline at end of file
diff --git a/chaosaws/msk/probes.py b/chaosaws/msk/probes.py
index 407bc73..d1b3d7d 100644
--- a/chaosaws/msk/probes.py
+++ b/chaosaws/msk/probes.py
@@ -2,6 +2,7 @@
 
 from chaoslib.types import Configuration, Secrets
 from chaoslib.exceptions import FailedActivity
+
 from chaosaws import aws_client, get_logger
 from chaosaws.types import AWSResponse
 
@@ -22,8 +23,8 @@ def describe_msk_cluster(
     logger.debug(f"Describing MSK cluster: {cluster_arn}")
     try:
         return client.describe_cluster(ClusterArn=cluster_arn)
-    except client.exceptions.NotFoundException as e:
-        raise FailedActivity("The specified cluster was not found") from e
+    except client.exceptions.NotFoundException:
+        raise FailedActivity("The specified cluster was not found")
 
 
 def get_bootstrap_servers(
@@ -39,5 +40,5 @@ def get_bootstrap_servers(
     try:
         response = client.get_bootstrap_brokers(ClusterArn=cluster_arn)
         return response["BootstrapBrokerString"].split(",") if response else []
-    except client.exceptions.NotFoundException as e:
-        raise FailedActivity("The specified cluster was not found") from e
+    except client.exceptions.NotFoundException:
+        raise FailedActivity("The specified cluster was not found")