diff --git a/cmd/shfmt/testdata/script/walk.txtar b/cmd/shfmt/testdata/script/walk.txtar
index 2969b9c3..16edcfc8 100644
--- a/cmd/shfmt/testdata/script/walk.txtar
+++ b/cmd/shfmt/testdata/script/walk.txtar
@@ -183,9 +183,9 @@ foo
 #!/bin/envsh
  foo
 
--- skip/ext.zsh
+-- skip/ext.zsh --
 foo
--- skip/shebang-zsh
+-- skip/shebang-zsh --
 #!/bin/zsh
 foo
 -- skip/.git/ext.sh --
diff --git a/fileutil/file.go b/fileutil/file.go
index d69a2b9b..822d21b2 100644
--- a/fileutil/file.go
+++ b/fileutil/file.go
@@ -13,8 +13,8 @@ import (
 )
 
 var (
-	shebangRe = regexp.MustCompile(`^#!\s?/(usr/)?bin/(env\s+)?(sh|bash|mksh|bats|zsh)(\s|$)`)
-	extRe     = regexp.MustCompile(`\.(sh|bash|mksh|bats|zsh)$`)
+	shebangRe = regexp.MustCompile(`^#!\s?/(usr/)?bin/(env\s+)?(sh|bash|mksh|bats)(\s|$)`)
+	extRe     = regexp.MustCompile(`\.(sh|bash|mksh|bats)$`)
 )
 
 // TODO: consider removing HasShebang in favor of Shebang in v4