diff --git a/client/allocdir/alloc_dir_test.go b/client/allocdir/alloc_dir_test.go
index 451ae32e6..82b3ae1cb 100644
--- a/client/allocdir/alloc_dir_test.go
+++ b/client/allocdir/alloc_dir_test.go
@@ -489,14 +489,15 @@ func TestAllocDir_DetectContentType(t *testing.T) {
 		"input/happy.gif": "image/gif",
 		"input/image.png": "image/png",
 		"input/nomad.jpg": "image/jpeg",
-		"input/test.go":   "application/octet-stream",
+		"input/test.bin":  "application/octet-stream",
 		"input/test.json": "application/json",
 		"input/test.txt":  "text/plain; charset=utf-8",
+		"input/test.go":   "text/plain; charset=utf-8",
 	}
 	for _, file := range testFiles {
 		fileInfo, err := os.Stat(file)
 		require.Nil(err)
 		res := detectContentType(fileInfo, file)
-		require.Equal(expectedEncodings[file], res)
+		require.Equal(expectedEncodings[file], res, "unexpected output for %v", file)
 	}
 }
diff --git a/client/allocdir/input/test.bin b/client/allocdir/input/test.bin
new file mode 100644
index 000000000..abc8240e4
--- /dev/null
+++ b/client/allocdir/input/test.bin
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef
+size 1024
diff --git a/client/allocdir/input/test.go b/client/allocdir/input/test.go
index 8fd43ed1e..fe29791c4 100644
--- a/client/allocdir/input/test.go
+++ b/client/allocdir/input/test.go
@@ -1,9 +1,26 @@
-package main
+package allocdir
 
 import (
-	"fmt"
+	"os"
+	"syscall"
 )
 
-func main() {
-	fmt.Println("Hello, playground")
+// linkDir hardlinks src to dst. The src and dst must be on the same filesystem.
+func linkDir(src, dst string) error {
+	return syscall.Link(src, dst)
+}
+
+// unlinkDir removes a directory link.
+func unlinkDir(dir string) error {
+	return syscall.Unlink(dir)
+}
+
+// createSecretDir creates the secrets dir folder at the given path
+func createSecretDir(dir string) error {
+	return os.MkdirAll(dir, 0777)
+}
+
+// removeSecretDir removes the secrets dir folder
+func removeSecretDir(dir string) error {
+	return os.RemoveAll(dir)
 }