diff --git a/crates/moon/src/cli/generate_test_driver.rs b/crates/moon/src/cli/generate_test_driver.rs
index 771f4342..1b6d4eea 100644
--- a/crates/moon/src/cli/generate_test_driver.rs
+++ b/crates/moon/src/cli/generate_test_driver.rs
@@ -51,7 +51,7 @@ pub struct GenerateTestDriverSubcommand {
     pub driver_kind: DriverKind,
 }
 
-fn moonc_gen_test_info(files: &[PathBuf], target_dir: &Path) -> anyhow::Result<String> {
+fn moonc_gen_test_info(files: &[PathBuf], output_path: &Path) -> anyhow::Result<String> {
     let mut generated = std::process::Command::new("moonc")
         .arg("gen-test-info")
         .arg("-json")
@@ -68,24 +68,21 @@ fn moonc_gen_test_info(files: &[PathBuf], target_dir: &Path) -> anyhow::Result<S
         .with_context(|| gen_error_message(files))?;
     generated.wait()?;
 
-    // append whitebox blackbox internal test info to test_info.json
-    {
-        let test_info_json_path = target_dir.join(TEST_INFO_FILE);
-        out.push('\n');
-        std::fs::OpenOptions::new()
-            .create(true)
-            .append(true)
-            .open(&test_info_json_path)
-            .context(format!(
-                "failed to open file: {}",
-                test_info_json_path.display()
-            ))?
-            .write_all(out.as_bytes())
-            .context(format!(
-                "failed to write file: {}",
-                test_info_json_path.display()
-            ))?;
-    }
+    let test_info_json_path = output_path;
+    std::fs::OpenOptions::new()
+        .create(true)
+        .truncate(true)
+        .write(true)
+        .open(test_info_json_path)
+        .context(format!(
+            "failed to open file: {}",
+            test_info_json_path.display()
+        ))?
+        .write_all(out.as_bytes())
+        .context(format!(
+            "failed to write file: {}",
+            test_info_json_path.display()
+        ))?;
 
     let t: MooncGenTestInfo = serde_json_lenient::from_str(&out)?;
     return Ok(t.to_mbt());
@@ -191,9 +188,24 @@ pub fn generate_test_driver(
             files,
             moonc_opt.build_opt.debug_flag,
             moonc_opt.build_opt.target_backend,
-        );
-        let mbts_test_data =
-            moonc_gen_test_info(&backend_filtered, &target_dir.join(pkg.rel.fs_full_name()))?;
+        )
+        .into_iter()
+        .filter(|file| {
+            // workaround for skip test coverage.mbt in builtin when --enable-coverage is specified
+            !(moonc_opt.build_opt.enable_coverage
+                && pkgname == "moonbitlang/core/builtin"
+                && file.to_str().unwrap().contains("coverage.mbt"))
+        })
+        .collect();
+
+        let mbts_test_data = moonc_gen_test_info(
+            &backend_filtered,
+            &target_dir.join(pkg.rel.fs_full_name()).join(format!(
+                "__{}_{}",
+                cmd.driver_kind.to_string(),
+                TEST_INFO_FILE,
+            )),
+        )?;
 
         if pkg.is_main && mbts_test_data.contains("(__test_") {
             eprintln!(
diff --git a/crates/moonbuild/src/entry.rs b/crates/moonbuild/src/entry.rs
index 6dbe6e87..4a8feabb 100644
--- a/crates/moonbuild/src/entry.rs
+++ b/crates/moonbuild/src/entry.rs
@@ -477,18 +477,33 @@ fn convert_moonc_test_info(
     filter_file: Option<&String>,
     sort_input: bool,
 ) -> anyhow::Result<IndexMap<PathBuf, FileTestInfo>> {
-    let content = std::fs::read_to_string(test_info_file)
-        .context(format!("failed to read {}", test_info_file.display()))?;
+    let mut test_info_files = vec![];
+    for (files, driver_kind) in [
+        (&pkg.files, DriverKind::Internal),
+        (&pkg.wbtest_files, DriverKind::Whitebox),
+        (&pkg.test_files, DriverKind::Blackbox),
+    ] {
+        if !files.is_empty() {
+            test_info_files.push(test_info_file.join(format!(
+                "__{}_{}",
+                driver_kind.to_string(),
+                TEST_INFO_FILE
+            )));
+        }
+    }
+
     let mut moonc_test_info = MooncGenTestInfo {
         no_args_tests: IndexMap::new(),
         with_args_tests: IndexMap::new(),
     };
-    // there are three line of json(internal, blackbox, whitebox) in test_info.json, merge them into one
-    for line in content.lines() {
-        if let Ok(info) = serde_json_lenient::from_str::<MooncGenTestInfo>(line) {
-            moonc_test_info.no_args_tests.extend(info.no_args_tests);
-            moonc_test_info.with_args_tests.extend(info.with_args_tests);
-        }
+    for test_info_file in test_info_files {
+        let content = std::fs::read_to_string(&test_info_file)
+            .context(format!("failed to read {}", test_info_file.display()))?;
+
+        let info = serde_json_lenient::from_str::<MooncGenTestInfo>(&content)
+            .context(format!("failed to parse {}", test_info_file.display()))?;
+        moonc_test_info.no_args_tests.extend(info.no_args_tests);
+        moonc_test_info.with_args_tests.extend(info.with_args_tests);
     }
 
     let mut current_pkg_test_info = IndexMap::new();
@@ -575,12 +590,9 @@ pub fn run_test(
         }
 
         // convert moonc test info
-        let test_info_file = moonbuild_opt
-            .target_dir
-            .join(pkg.rel.fs_full_name())
-            .join(TEST_INFO_FILE);
+        let test_info_file_dir = moonbuild_opt.target_dir.join(pkg.rel.fs_full_name());
         let current_pkg_test_info = convert_moonc_test_info(
-            &test_info_file,
+            &test_info_file_dir,
             pkg,
             moonc_opt.link_opt.output_format.to_str(),
             filter_file,