diff --git a/cmd/transpile/main.go b/cmd/transpile/main.go
index 58a0bdb..f225464 100644
--- a/cmd/transpile/main.go
+++ b/cmd/transpile/main.go
@@ -81,7 +81,7 @@ func (t *T) ParseArgs() (Command, error) {
 	default:
 		fmt.Fprintln(t.Stderr, "ERROR:", t.Args[1], "is not a valid command")
 		usage(t.Stderr)
-		return nothing, fmt.Errorf("Invalid command")
+		return nothing, fmt.Errorf("invalid command")
 	}
 
 	if err := flags.Parse(t.Args[2:]); err != nil {
diff --git a/cmd/transpile/main_test.go b/cmd/transpile/main_test.go
index e501337..042795a 100644
--- a/cmd/transpile/main_test.go
+++ b/cmd/transpile/main_test.go
@@ -4,7 +4,9 @@ import (
 	"archive/zip"
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
+	"os"
 	"strings"
 	"testing"
 
@@ -202,3 +204,32 @@ func TestFilesystem(t *testing.T) {
 		t.Error("Wrong file pulled", stdout.String())
 	}
 }
+
+func TestCwd(t *testing.T) {
+	testwd, err := os.Getwd()
+	if err != nil {
+		t.Error("Can't get current working directory!")
+		return
+	}
+	defer os.Chdir(testwd)
+
+	stdin := new(bytes.Buffer)
+	stdout := new(bytes.Buffer)
+	stderr := new(bytes.Buffer)
+	tp := T{
+		Stdin:  stdin,
+		Stdout: stdout,
+		Stderr: stderr,
+		BaseFs: afero.NewOsFs(),
+	}
+
+	stdout.Reset()
+	os.Chdir("/")
+	if err := tp.Run(
+		"file",
+		fmt.Sprintf("-dir=%s/testdata/cat1/1", testwd),
+		"moo.txt",
+	); err != nil {
+		t.Error(err)
+	}
+}