diff --git a/collector_test.go b/collector_test.go
new file mode 100644
index 0000000..73dac66
--- /dev/null
+++ b/collector_test.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewCollector(t *testing.T) {
+	c := NewCollector(map[string]*ConnectBox{"test": {}})
+	require.Len(t, c.targets, 1)
+}