diff --git a/2020/day06/main_test.go b/2020/day06/main_test.go
new file mode 100644
index 0000000..09b5032
--- /dev/null
+++ b/2020/day06/main_test.go
@@ -0,0 +1,29 @@
+package main
+
+import "testing"
+
+var input = []string{
+	"abc",
+	"",
+	"a",
+	"b",
+	"c",
+	"",
+	"ab",
+	"ac",
+	"",
+	"a",
+	"a",
+	"a",
+	"a",
+	"",
+	"b",
+}
+
+func TestPartOne(t *testing.T) {
+	expected := 11
+	got := PartOne(input)
+	if got != expected {
+		t.Errorf("PartOne() = %d, want %d", got, expected)
+	}
+}