diff --git a/tests/data/env_wrapper.sh b/tests/data/env_wrapper.sh
deleted file mode 100755
index afb523f0..00000000
--- a/tests/data/env_wrapper.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-# This script exists to test the behavior of Stream.python_path being set to a
-# list. It sets an environmnt variable that we can detect, then executes any
-# arguments passed to it.
-export EXECUTED_VIA_ENV_WRAPPER=1
-if [ "${1:0:1}" == "-" ]; then
-    exec "$PYTHON" "$@"
-else
-    export ENV_WRAPPER_FIRST_ARG="$1"
-    shift
-    exec "$@"
-fi
diff --git a/tests/data/stubs/stub-python.py b/tests/data/stubs/stub-python.py
new file mode 100755
index 00000000..d9239c2b
--- /dev/null
+++ b/tests/data/stubs/stub-python.py
@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+
+import json
+import os
+import subprocess
+import sys
+
+os.environ['ORIGINAL_ARGV'] = json.dumps(sys.argv)
+os.environ['THIS_IS_STUB_PYTHON'] = '1'
+
+if sys.argv[1].startswith('-'):
+    os.execvp(sys.executable, [sys.executable] + sys.argv[1:])
+else:
+    os.environ['STUB_PYTHON_FIRST_ARG'] = sys.argv.pop(1)
+    os.execvp(sys.executable, sys.argv[1:])
diff --git a/tests/local_test.py b/tests/local_test.py
index 5a620e52..fe2bd149 100644
--- a/tests/local_test.py
+++ b/tests/local_test.py
@@ -5,11 +5,8 @@ import sys
 import unittest2
 
 import mitogen
-import mitogen.ssh
-import mitogen.utils
 
 import testlib
-import plain_old_module
 
 
 def get_sys_executable():
@@ -20,43 +17,37 @@ def get_os_environ():
     return dict(os.environ)
 
 
-class LocalTest(testlib.RouterMixin, testlib.TestCase):
-    stream_class = mitogen.ssh.Stream
+class ConstructionTest(testlib.RouterMixin, testlib.TestCase):
+    stub_python_path = testlib.data_path('stubs/stub-python.py')
 
     def test_stream_name(self):
         context = self.router.local()
         pid = context.call(os.getpid)
         self.assertEquals('local.%d' % (pid,), context.name)
 
-
-class PythonPathTest(testlib.RouterMixin, testlib.TestCase):
-    stream_class = mitogen.ssh.Stream
-
-    def test_inherited(self):
+    def test_python_path_inherited(self):
         context = self.router.local()
         self.assertEquals(sys.executable, context.call(get_sys_executable))
 
-    def test_string(self):
-        os.environ['PYTHON'] = sys.executable
+    def test_python_path_string(self):
         context = self.router.local(
-            python_path=testlib.data_path('env_wrapper.sh'),
+            python_path=self.stub_python_path,
         )
-        self.assertEquals(sys.executable, context.call(get_sys_executable))
         env = context.call(get_os_environ)
-        self.assertEquals('1', env['EXECUTED_VIA_ENV_WRAPPER'])
+        self.assertEquals('1', env['THIS_IS_STUB_PYTHON'])
 
-    def test_list(self):
+    def test_python_path_list(self):
         context = self.router.local(
             python_path=[
-                testlib.data_path('env_wrapper.sh'),
+                self.stub_python_path,
                 "magic_first_arg",
                 sys.executable
             ]
         )
         self.assertEquals(sys.executable, context.call(get_sys_executable))
         env = context.call(get_os_environ)
-        self.assertEquals('magic_first_arg', env['ENV_WRAPPER_FIRST_ARG'])
-        self.assertEquals('1', env['EXECUTED_VIA_ENV_WRAPPER'])
+        self.assertEquals('magic_first_arg', env['STUB_PYTHON_FIRST_ARG'])
+        self.assertEquals('1', env['THIS_IS_STUB_PYTHON'])
 
 
 if __name__ == '__main__':