diff --git a/tests/DPT013.test.ts b/tests/DPT013.test.ts
index 98edaee..e32d2e4 100644
--- a/tests/DPT013.test.ts
+++ b/tests/DPT013.test.ts
@@ -42,6 +42,20 @@ describe("Test DPT013", (): void => {
     expect(compareBuffers(dpt.encoder(value), buffer)).is.true;
   });
 
+  it("encode not integer", async function () {
+    var testFunction = function () {
+      const value = dpt.encoder(Math.PI)
+    }
+    expect(testFunction).to.throw(InvalidValueError);
+  });
+
+  it("encode out of range", async function () {
+    var testFunction = function () {
+      const value = dpt.encoder(-Math.pow(2, 31) - 1)
+    }
+    expect(testFunction).to.throw(InvalidValueError);
+  });
+
   it("encode undefined", async function () {
     var testFunction = function () {
       const value = dpt.encoder(undefined)