diff --git a/utils/timer/clock_test.go b/utils/timer/clock_test.go
new file mode 100644
index 0000000..ef8eb67
--- /dev/null
+++ b/utils/timer/clock_test.go
@@ -0,0 +1,37 @@
+package timer
+
+import (
+	"testing"
+	"time"
+)
+
+func TestClockSet(t *testing.T) {
+	clock := Clock{}
+	clock.Set(time.Unix(1000000, 0))
+	if clock.faked == false {
+		t.Error("Fake time was set, but .faked flag was not set")
+	}
+	if !clock.Time().Equal(time.Unix(1000000, 0)) {
+		t.Error("Fake time was set, but not returned")
+	}
+}
+
+func TestClockSync(t *testing.T) {
+	clock := Clock{true, time.Unix(0, 0)}
+	clock.Sync()
+	if clock.faked == true {
+		t.Error("Clock was synced, but .faked flag was set")
+	}
+	if clock.Time().Equal(time.Unix(0, 0)) {
+		t.Error("Clock was synced, but returned a fake time")
+	}
+}
+
+func TestClockUnix(t *testing.T) {
+	clock := Clock{true, time.Unix(-14159040, 0)}
+	actual := clock.Unix()
+	if actual != 0 {
+		// We are Unix of 1970s, Moon landings are irrelevant
+		t.Errorf("Expected time prior to Unix epoch to be clamped to 0, got %d", actual)
+	}
+}