diff --git a/pytest_abra/runner.py b/pytest_abra/runner.py
index b2f83ff..1e310ca 100644
--- a/pytest_abra/runner.py
+++ b/pytest_abra/runner.py
@@ -164,7 +164,7 @@ class Runner:
         # command_arguments.append("on")
 
         # Disable capturing. With -s set, prints will go to console as if pytest is not there.
-        if os.environ["PWDEBUG"] == "1":
+        if os.environ.get("PWDEBUG") == "1":
             command_arguments.append("-s")
 
         # headed