diff --git a/predict/options_test.go b/predict/options_test.go
new file mode 100644
index 0000000..dc6d83d
--- /dev/null
+++ b/predict/options_test.go
@@ -0,0 +1,39 @@
+package predict
+
+import "testing"
+
+import "github.com/stretchr/testify/assert"
+
+func TestConfigCheck(t *testing.T) {
+	t.Parallel()
+
+	t.Run("enabled", func(t *testing.T) {
+		cfg := Options(OptValues("foo", "bar", "foo-bar"), OptCheck())
+		assert.NoError(t, cfg.Check("foo"))
+		assert.NoError(t, cfg.Check("bar"))
+		assert.NoError(t, cfg.Check("foo-bar"))
+		assert.Error(t, cfg.Check("fo"))
+		assert.Error(t, cfg.Check("baz"))
+	})
+
+	t.Run("disabled", func(t *testing.T) {
+		cfg := Options(OptValues("foo", "bar", "foo-bar"))
+		assert.NoError(t, cfg.Check("foo"))
+		assert.NoError(t, cfg.Check("fo"))
+		assert.NoError(t, cfg.Check("baz"))
+	})
+}
+
+func TestConfigPredict(t *testing.T) {
+	t.Parallel()
+
+	t.Run("set", func(t *testing.T) {
+		cfg := Options(OptValues("foo", "bar", "foo-bar"))
+		assert.Equal(t, []string{"foo", "bar", "foo-bar"}, cfg.Predict(""))
+	})
+
+	t.Run("not set", func(t *testing.T) {
+		cfg := Options()
+		assert.Nil(t, cfg.Predict(""))
+	})
+}