diff --git a/tox.ini b/tox.ini
index 0b27125..eb73a72 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,14 +3,12 @@
 
 [tox]
 # The following configuration will run automatically.
-envlist = py{37}-{default,legacy_wexpect,spawn_pipe},installed,pyinstaller
+envlist = py{37}-{legacy_wexpect,spawn_pipe},installed,pyinstaller
+
 
 [testenv]
 description = Unit tests
 
-passenv = 
-    WEXPECT_*
-
 # Set environment variables to select the proper configuration for each envirnment.
 setenv =
     spawn_pipe:     WEXPECT_SPAWN_CLASS=SpawnPipe
@@ -33,48 +31,46 @@ commands =
     # https://tox.readthedocs.io/en/latest/config.html#environment-variable-substitutions
     coverage xml --omit=tests/*,site-packages -o {env:TOX_ENV_NAME}_coverage.xml
 
+
 [testenv:installed]
-# normal tests test the cloned files. This testenv tests the installation itself.
-description = Unit tests installed
+# normal tests test the cloned files. This testenv tests the installation itself, with the default
+# spawn class.
+description = Unit tests installed, and default spawn class.
 
 changedir = test_01_installed
 
-whitelist_externals = 
+whitelist_externals =
     cp
 
-# Appveyor will set the WEXPECT_SPAWN_CLASS to run the proper configuration for each run.
-passenv = 
-    WEXPECT_*
-    
 commands =
-    
     # copy all testcase into working dir
     cp -r ../tests tests
-    
-    # Run the test itself
-    python -m unittest
+
+    # Run the test itself. Running all tests is not needed, because it just test the installation,
+    # not functions.
+    python -m unittest tests.test_misc
+
 
 [testenv:pyinstaller]
 # Test if wexpect working with pyinstaller. See #12 for more details.
 description = Unit tests pyinstaller
 
-whitelist_externals = 
+whitelist_externals =
     pyinstaller
     pyinstaller_test
-    
+
 setenv =
     WEXPECT_SPAWN_CLASS=SpawnPipe
-    
+
 commands =
     # install the dependencies:
     pip install .[test]
-    
+
     # create wexpect executable for console-reader.
     pyinstaller wexpect.spec
-    
+
     # create test executable, to thest the console-reader
     pyinstaller tests/pyinstaller_test.py
-    
+
     # run test:
     dist\pyinstaller_test\pyinstaller_test.exe
-