diff --git a/.travis.yml b/.travis.yml
index 7d048a7..4b0078e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,4 +20,6 @@ matrix:
     - pytest --cov
     - coveralls
 
+install: pip install -e .[tests]
+
 script: pytest -v
diff --git a/README.md b/README.md
index 4bd6162..0decfaf 100644
--- a/README.md
+++ b/README.md
@@ -48,12 +48,11 @@ python -m pip install -e .
 I didn't know of any other easy ways to do these Git tasks:
 
 * `gitbranch` Tells of any non-master branches under directory ~/code
-* `git_filemode_windows`  Sets all git repos to don't care permissions under directory ~/code
 * `gitemail` list all contributor email addresses. Optionally, amend email addresses for prior Git commits
 
 ### Sync large number of git repos
 
-These assume numerous subdirectories under `~/code` or `c:\code`. 
+These assume numerous subdirectories under `~/code` or `c:\code`.
 They work very quickly for large numbers (100+) repos.
 
 
@@ -67,7 +66,7 @@ You can place an empty file `.nogit` in a subdirectory to skip it.
 
 #### [optional] speedup with https pull
 For public repos, to make the Git remote checking go at least twice as fast, and significantly reduce the computational burden when SSH is used for `git push` (as is recommended), consider the "pushInsteadOf" global Git config.
-To do this, when cloning a public repo (including ones you're a collaborator on), use `git clone https://`. 
+To do this, when cloning a public repo (including ones you're a collaborator on), use `git clone https://`.
 This global SSH push config one-time does SSH push for HTTPS-cloned repos:
 ```sh
 git config --global url."ssh://github.com/".pushInsteadOf https://github.com/
diff --git a/git_filemode_windows.py b/git_filemode_windows.py
deleted file mode 100755
index d4a9ef3..0000000
--- a/git_filemode_windows.py
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/usr/bin/env python
-"""
-sets core.fileMode=false for git repos
-mostly for Windows, particularly Cygwin
-"""
-from pathlib import Path
-from subprocess import call
-from argparse import ArgumentParser
-
-
-def main():
-    p = ArgumentParser()
-    p.add_argument('codepath', help='path to code root', nargs='?', default='~/code')
-    p = p.parse_args()
-
-    rdir = Path(p.codepath).expanduser()
-
-    dlist = [x for x in rdir.iterdir() if x.is_dir()]
-
-    print('setting fileMode=false for', len(dlist), 'directories under', rdir)
-
-    for d in dlist:
-        call(['git', 'config', 'core.filemode', 'false'], cwd=d)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/gitutils/branch.py b/gitutils/branch.py
index 5c54655..43ac22b 100644
--- a/gitutils/branch.py
+++ b/gitutils/branch.py
@@ -6,13 +6,8 @@
 from pathlib import Path
 import asyncio
 import logging
-import shutil
 
-from .git import baddir
-
-GITEXE = shutil.which('git')
-if not GITEXE:
-    raise FileNotFoundError('Could not find executable for Git')
+from .git import baddir, GITEXE
 
 CMD = [GITEXE, 'rev-parse', '--abbrev-ref', 'HEAD']
 
diff --git a/gitutils/git.py b/gitutils/git.py
index 8661ac5..75e9dc1 100644
--- a/gitutils/git.py
+++ b/gitutils/git.py
@@ -21,10 +21,10 @@
 
 """
 replaced by git status --porcelain:
-  ['git','ls-files','-o','-d','--exclude-standard']): # check for uncommitted files
-  ['git','--no-pager','diff','HEAD'], # check for uncommitted work
+  git ls-files -o -d --exclude-standard: # check for uncommitted files
+  git --no-pager diff HEAD , # check for uncommitted work
 
-DOES NOT WORK ['git','log','--branches','--not','--remotes'],     # check for uncommitted branches
+DOES NOT WORK git log --branches --not --remotes     # check for uncommitted branches
 """
 
 
@@ -94,7 +94,7 @@ def listchanged(path: Path) -> List[str]:
     changes : list of str
         filenames changed in this Git repo
     """
-    ret = subprocess.check_output(['git', 'ls-files', '--modified'],
+    ret = subprocess.check_output([GITEXE, 'ls-files', '--modified'],
                                   universal_newlines=True,
                                   cwd=path)