diff --git a/coverage_config_x86_64.json b/coverage_config_x86_64.json
index d80d206..cc4b78b 100644
--- a/coverage_config_x86_64.json
+++ b/coverage_config_x86_64.json
@@ -1,5 +1,5 @@
 {
-    "coverage_score": 33.3, 
+    "coverage_score": 100.0, 
     "exclude_path": "", 
     "crate_features": ""
 }
diff --git a/src/lib.rs b/src/lib.rs
index a285917..553f088 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,11 @@
-pub fn main() {
-    println!("It works!");
+pub fn add(a: u32, b: u32) -> u32 {
+    a + b
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_add() {
+        assert_eq!(super::add(1, 2), 3)
+    }
 }