diff --git a/helpers/pathname_test.go b/helpers/pathname_test.go
new file mode 100644
index 0000000..f94694a
--- /dev/null
+++ b/helpers/pathname_test.go
@@ -0,0 +1,12 @@
+package helpers
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestTrimExt(t *testing.T) {
+	require.Equal(t, "/a/b", TrimExt("/a/b.c"))
+	require.Equal(t, "/a/b", TrimExt("/a/b"))
+}
diff --git a/helpers/yaml_test.go b/helpers/yaml_test.go
new file mode 100644
index 0000000..7aa4b7c
--- /dev/null
+++ b/helpers/yaml_test.go
@@ -0,0 +1,34 @@
+package helpers
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+const mapYaml = "a: 1\nb: 2"
+const listYaml = "- a\n- b"
+
+func TestUnmarshalYAML(t *testing.T) {
+	var d interface{}
+	err := UnmarshalYAMLInterface([]byte(mapYaml), &d)
+	require.NoError(t, err)
+	switch d := d.(type) {
+	case map[interface{}]interface{}:
+		require.Len(t, d, 2)
+		require.Equal(t, 1, d["a"])
+	default:
+		require.IsType(t, d, map[interface{}]interface{}{})
+	}
+
+	err = UnmarshalYAMLInterface([]byte(listYaml), &d)
+	require.NoError(t, err)
+	require.IsType(t, d, []interface{}{})
+	switch d := d.(type) {
+	case []interface{}:
+		require.Len(t, d, 2)
+		require.Equal(t, "a", d[0])
+	default:
+		require.IsType(t, d, map[interface{}]interface{}{})
+	}
+}