diff --git a/appendbytes_test.go b/appendbytes_test.go
index 0ef8a2b..1c9b9a3 100644
--- a/appendbytes_test.go
+++ b/appendbytes_test.go
@@ -15,6 +15,14 @@ func TestAppendBytes(t *testing.T) {
 		Slice []byte
 		Expected []byte
 	}{
+		{
+			Bytes:    []byte("Hello world! 🙂 Take a look at this: "),
+			Slice:                                         []byte(""),
+			Expected: []byte("Hello world! 🙂 Take a look at this: "),
+		},
+
+
+
 		{
 			Bytes:    []byte("Hello world! 🙂 Take a look at this: "),
 			Slice:                                         []byte("This is NOT <b>bold</b>!"),
diff --git a/appendstring_test.go b/appendstring_test.go
index 2b32cd9..91166cb 100644
--- a/appendstring_test.go
+++ b/appendstring_test.go
@@ -15,6 +15,14 @@ func TestAppendString(t *testing.T) {
 		String string
 		Expected []byte
 	}{
+		{
+			Bytes:    []byte("Hello world! 🙂 Take a look at this: "),
+			String:                                               "",
+			Expected: []byte("Hello world! 🙂 Take a look at this: "),
+		},
+
+
+
 		{
 			Bytes:    []byte("Hello world! 🙂 Take a look at this: "),
 			String:                                               "This is NOT <b>bold</b>!",