diff --git a/keyboard_test.go b/keyboard_test.go
index d939b4d..34e08bc 100644
--- a/keyboard_test.go
+++ b/keyboard_test.go
@@ -67,6 +67,43 @@ func TestKeyOutsideOfRangeKeyPressFails(t *testing.T) {
 		t.Fatalf("Expected key press to fail due to invalid key code, but got no error.")
 	}
 
+}
+func TestKeyOutsideOfRangeKeyUpFails(t *testing.T) {
+	vk, err := CreateKeyboard("/dev/uinput", []byte("Test Basic Keyboard"))
+	if err != nil {
+		t.Fatalf("Failed to create the virtual keyboard. Last error was: %s\n", err)
+	}
+	defer vk.Close()
+
+	err = vk.KeyUp(249)
+	if err == nil {
+		t.Fatalf("Expected key press to fail due to invalid key code, but got no error.")
+	}
+
+	err = vk.KeyUp(-1)
+	if err == nil {
+		t.Fatalf("Expected key press to fail due to invalid key code, but got no error.")
+	}
+
+}
+
+func TestKeyOutsideOfRangeKeyDownFails(t *testing.T) {
+	vk, err := CreateKeyboard("/dev/uinput", []byte("Test Basic Keyboard"))
+	if err != nil {
+		t.Fatalf("Failed to create the virtual keyboard. Last error was: %s\n", err)
+	}
+	defer vk.Close()
+
+	err = vk.KeyDown(249)
+	if err == nil {
+		t.Fatalf("Expected key press to fail due to invalid key code, but got no error.")
+	}
+
+	err = vk.KeyDown(-1)
+	if err == nil {
+		t.Fatalf("Expected key press to fail due to invalid key code, but got no error.")
+	}
+
 }
 
 func TestKeyPressFailsIfDeviceIsClosed(t *testing.T) {