diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 2df2339873..3e6b867cc4 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -9,6 +9,7 @@ Python 3.6 is no longer supported; Stackstorm requires at least Python 3.8.
 Fixed
 ~~~~~
 * Restore Pack integration testing (it was inadvertently skipped) and stop testing against `bionic` and `el7`. #6135
+* Fix Popen.pid typo in st2tests. #6184
 
 Changed
 ~~~~~~~
diff --git a/st2tests/st2tests/base.py b/st2tests/st2tests/base.py
index 6c3a04fb52..7847a93dc8 100644
--- a/st2tests/st2tests/base.py
+++ b/st2tests/st2tests/base.py
@@ -599,7 +599,7 @@ def _stop_running_processes(self):
                 except:
                     stderr = None
 
-                print("Stopping process with pid %s" % (process.id))
+                print("Stopping process with pid %s" % (process.pid))
                 print('Process "%s"' % (process.pid))
                 print("Stdout: %s" % (stdout))
                 print("Stderr: %s" % (stderr))