diff --git a/checksum/crc16_test.go b/checksum/crc16_test.go
new file mode 100644
index 000000000..386746f4e
--- /dev/null
+++ b/checksum/crc16_test.go
@@ -0,0 +1,24 @@
+package checksum
+
+import "testing"
+
+func TestCRC16(t *testing.T) {
+    tests := []struct {
+        input    string
+        expected string
+    }{
+        {"hello", "A001"},
+        {"world", "B5D0"},
+        {"golang", "A34C"},
+        {"", "A001"},
+    }
+
+    for _, tt := range tests {
+        t.Run(tt.input, func(t *testing.T) {
+            got := CRC16Hex(tt.input)
+            if got != tt.expected {
+                t.Errorf("CRC16Hex(%q) = %q; want %q", tt.input, got, tt.expected)
+            }
+        })
+    }
+}