diff --git a/tox.ini b/tox.ini
index 9c305d61a..c9465a415 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,11 +33,11 @@ commands =
 # E040: Syntax error determined using `bash -n` (as many scripts
 #       use jinja templating, this will often fail and the syntax
 #       error will be discovered in execution anyway)
-    bash -c "grep --recursive --binary-files=without-match \
+    bash -c "git ls-files | xargs grep --binary-files=without-match \
         --files-with-match '^.!.*\(ba\)\?sh$' \
         --exclude-dir .tox \
         --exclude-dir .git \
-        {toxinidir} | xargs bashate --error . --verbose --ignore=E006,E040"
+        | xargs bashate --error . --verbose --ignore=E006,E040"
 
 [testenv:pep8]
 commands =