diff --git a/nixos/modules/tests/run-client.py b/nixos/modules/tests/run-client.py
index bcbca050b5380f3b8f3aa9691a4f6dd62b198523..e28293980b75f3fa4002e34ac45abe20b9fae02f 100755
--- a/nixos/modules/tests/run-client.py
+++ b/nixos/modules/tests/run-client.py
@@ -14,10 +14,6 @@ from configparser import ConfigParser
 def main():
     (introducerFURL, issuerURL) = argv[1:]
 
-    # PYTHONHOME set for Python 3 for this script breaks Python 2 used by
-    # Tahoe. :/ This is kind of a NixOS Python packaging bug.
-    del environ["PYTHONHOME"]
-
     run(["tahoe", "--version"])
     run([
         "tahoe", "create-client",
diff --git a/nixos/modules/tests/run-introducer.py b/nixos/modules/tests/run-introducer.py
index 7a69bdb8240b5dc6b347b960762dd4e2ef0cdde1..33c3ec10369477e39c1461b3e59149e015f03ce9 100755
--- a/nixos/modules/tests/run-introducer.py
+++ b/nixos/modules/tests/run-introducer.py
@@ -17,10 +17,6 @@ log = print
 def main():
     pemFile, introducerPort, introducerFURL = argv[1:]
 
-    # PYTHONHOME set for Python 3 for this script breaks Python 2 used by
-    # Tahoe. :/ This is kind of a NixOS Python packaging bug.
-    del environ["PYTHONHOME"]
-
     run(["tahoe", "--version"])
     run([
         "tahoe", "create-introducer",