diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..46c0dc6
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,4 @@
+os:
+  - linux
+  - osx
+script: ./check_integrity.sh $(find bin | cut -b 5- | xargs)
diff --git a/check_integrity.sh b/check_integrity.sh
index cc029a4..f6dc186 100755
--- a/check_integrity.sh
+++ b/check_integrity.sh
@@ -15,7 +15,7 @@ check_bash_script() {
         || err "Run 'chmod +x bin/$cmd' to make it executable"
 
     shebang=$(head -n1 "bin/$cmd")
-    test "$shebang" == "#!/usr/bin/env bash" \
+    [[ "$shebang" =~ \#![[:space:]]*/usr/bin/env[[:space:]]+bash ]] \
         || err "Start git-$1 with '#!/usr/bin/env bash'"
 }
 
diff --git a/etc/git-extras-completion.zsh b/etc/git-extras-completion.zsh
index 03d760d..09be7a1 100644
--- a/etc/git-extras-completion.zsh
+++ b/etc/git-extras-completion.zsh
@@ -391,6 +391,7 @@ zstyle ':completion:*:*:git:*' user-commands \
     pr:'checks out a pull request locally' \
     psykorebase:'rebase a branch with a merge commit' \
     pull-request:'create pull request to GitHub project' \
+    reauthor:'replace the author and/or committer identities in commits and tags' \
     rebase-patch:'rebases a patch' \
     refactor:'create refactor branch' \
     release:'commit, tag and push changes to the repository' \