diff --git a/config/setup/ext_test.go b/config/setup/ext_test.go
new file mode 100644
index 00000000..27730230
--- /dev/null
+++ b/config/setup/ext_test.go
@@ -0,0 +1,31 @@
+package setup
+
+import (
+	"testing"
+
+	"github.com/mholt/caddy/middleware/gzip"
+)
+
+func TestExt(t *testing.T) {
+	c := newTestController(`ext .html .htm .php`)
+
+	mid, err := Ext(c)
+
+	if err != nil {
+		t.Errorf("Expected no errors, got: %v", err)
+	}
+
+	if mid == nil {
+		t.Fatal("Expected middleware, was nil instead")
+	}
+
+	handler := mid(emptyNext)
+	myHandler, ok := handler.(ext.Ext)
+	if !ok {
+		t.Fatalf("Expected handler to be type Ext, got: %#v", handler)
+	}
+
+	if !sameNext(myHandler.Next, emptyNext) {
+		t.Error("'Next' field of handler was not set properly")
+	}
+}
\ No newline at end of file