diff --git a/record/custom_records_test.go b/record/custom_records_test.go
new file mode 100644
index 000000000..6b41f8266
--- /dev/null
+++ b/record/custom_records_test.go
@@ -0,0 +1,54 @@
+package record
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// TestCustomRecordKeysend tests that a keysend entry is always detected in a
+// custom record set.
+func TestCustomRecordKeysend(t *testing.T) {
+	tests := []struct {
+		name            string
+		records         CustomSet
+		expectedKeySend bool
+	}{
+		{
+			name:            "empty custom set",
+			records:         make(CustomSet),
+			expectedKeySend: false,
+		},
+		{
+			name: "contains keysend record",
+			records: CustomSet{
+				KeySendType: []byte{1, 2, 3},
+			},
+			expectedKeySend: true,
+		},
+		{
+			name: "contains other records but no keysend",
+			records: CustomSet{
+				CustomTypeStart: []byte{1, 2, 3},
+			},
+			expectedKeySend: false,
+		},
+		{
+			name: "contains keysend and other records",
+			records: CustomSet{
+				KeySendType:     []byte{1},
+				CustomTypeStart: []byte{2},
+			},
+			expectedKeySend: true,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			result := test.records.IsKeysend()
+			require.Equal(t, test.expectedKeySend, result)
+		})
+	}
+}