Pass fully qualified test names to Centipede and strip crate name only for Centipede's --binary.

rust/cargo_fuzztest/tests/e2e_cli_test.rs

@@ -326,9 +326,9 @@ fn test_cargo_fuzztest_e2e_replay_corpus() {
     expect_true!(output.status.success());
     expect_true!(
         stderr_str.contains(
-            "Replaying __fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 2s"
+            "Replaying sample_fuzz_crate.__fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 2s"
         ) || stdout_str.contains(
-            "Replaying __fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 2s"
+            "Replaying sample_fuzz_crate.__fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 2s"
         )
     );
 }
@@ -384,9 +384,9 @@ fn test_cargo_fuzztest_e2e_replay_corpus_total_budget() {
     expect_true!(output.status.success());
     expect_true!(
         stderr_str.contains(
-            "Replaying __fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 1.5s"
+            "Replaying sample_fuzz_crate.__fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 1.5s"
         ) || stdout_str.contains(
-            "Replaying __fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 1.5s"
+            "Replaying sample_fuzz_crate.__fuzztest_mod__sample_fuzztest_target.sample_fuzztest_target for 1.5s"
         )
     );
 }

rust/e2e_tests/standalone_mode_test.rs

@@ -181,11 +181,11 @@ fn standalone_mode_replay_corpus_per_test_budget(fixture: &EnvVars) {
     // Create corpus dirs for tests
     let test1_dir = corpus_db
         .join(identifier_relative)
-        .join("__fuzztest_mod__standalone_validation_test.standalone_validation_test")
+        .join("standalone_fuzz_tests_bin.__fuzztest_mod__standalone_validation_test.standalone_validation_test")
         .join("coverage");
     let test2_dir = corpus_db
         .join(identifier_relative)
-        .join("__fuzztest_mod__second_validation_test.second_validation_test")
+        .join("standalone_fuzz_tests_bin.__fuzztest_mod__second_validation_test.second_validation_test")
         .join("coverage");
 
     std::fs::create_dir_all(&test1_dir).unwrap();
@@ -224,12 +224,12 @@ fn standalone_mode_replay_corpus_per_test_budget(fixture: &EnvVars) {
     // Verify logs for per-test
     expect_that!(
         stderr_per_test,
-        matchers::contains_substring("Replaying __fuzztest_mod__standalone_validation_test.standalone_validation_test for 3s")
+        matchers::contains_substring("Replaying standalone_fuzz_tests_bin.__fuzztest_mod__standalone_validation_test.standalone_validation_test for 3s")
     );
     expect_that!(
         stderr_per_test,
         matchers::contains_substring(
-            "Replaying __fuzztest_mod__second_validation_test.second_validation_test for 3s"
+            "Replaying standalone_fuzz_tests_bin.__fuzztest_mod__second_validation_test.second_validation_test for 3s"
         )
     );
 
@@ -271,11 +271,11 @@ fn standalone_mode_replay_corpus_total_budget(fixture: &EnvVars) {
     // Create corpus dirs for tests
     let test1_dir = corpus_db
         .join(identifier_relative)
-        .join("__fuzztest_mod__standalone_validation_test.standalone_validation_test")
+        .join("standalone_fuzz_tests_bin.__fuzztest_mod__standalone_validation_test.standalone_validation_test")
         .join("coverage");
     let test2_dir = corpus_db
         .join(identifier_relative)
-        .join("__fuzztest_mod__second_validation_test.second_validation_test")
+        .join("standalone_fuzz_tests_bin.__fuzztest_mod__second_validation_test.second_validation_test")
         .join("coverage");
 
     std::fs::create_dir_all(&test1_dir).unwrap();
@@ -315,12 +315,12 @@ fn standalone_mode_replay_corpus_total_budget(fixture: &EnvVars) {
     // Verify logs for total -> should be 1s
     expect_that!(
         stderr_total,
-        matchers::contains_substring("Replaying __fuzztest_mod__standalone_validation_test.standalone_validation_test for 1s")
+        matchers::contains_substring("Replaying standalone_fuzz_tests_bin.__fuzztest_mod__standalone_validation_test.standalone_validation_test for 1s")
     );
     expect_that!(
         stderr_total,
         matchers::contains_substring(
-            "Replaying __fuzztest_mod__second_validation_test.second_validation_test for 1s"
+            "Replaying standalone_fuzz_tests_bin.__fuzztest_mod__second_validation_test.second_validation_test for 1s"
         )
     );
 

rust/e2e_tests/worker_with_centipede_sanitizer_test.rs

@@ -33,7 +33,7 @@ fn ensure_use_after_free_signature_with_asan(fixture: &EnvVars) {
         &format!("--binary={}", fixture.target_binary_path.display()),
         &format!("--workdir={}", work_dir.display()),
         "--exit_on_crash",
-        "--test_name=__fuzztest_mod__use_after_free_asan_death_test.use_after_free_asan_death_test",
+        "--test_name=fuzztest_main.__fuzztest_mod__use_after_free_asan_death_test.use_after_free_asan_death_test",
     ];
 
     let stderr = test_utils::run_centipede_with_args_expect_termination(fixture, &args);
@@ -64,7 +64,7 @@ fn ensure_sanitizer_crash_signature_with_msan(fixture: &EnvVars) {
         &format!("--binary={}", fixture.target_binary_path.display()),
         &format!("--workdir={}", work_dir.display()),
         "--exit_on_crash",
-        "--test_name=__fuzztest_mod__msan_death_test.msan_death_test",
+        "--test_name=fuzztest_main.__fuzztest_mod__msan_death_test.msan_death_test",
     ];
 
     let stderr = test_utils::run_centipede_with_args_expect_termination(fixture, &args);

rust/e2e_tests/worker_with_centipede_test.rs

@@ -37,7 +37,7 @@ fn run_centipede_test<'a>(
             rust_test_name
         ),
         format!("--workdir={}", work_dir.display()),
-        format!("--test_name={}", test_name),
+        format!("--test_name=fuzztest_main.{}", test_name),
     ];
     args.extend(extra_args.into_iter().map(|s| s.to_string()));
 

rust/fuzztest_macro/src/helpers/test_registration.rs

@@ -152,14 +152,7 @@ impl<'a> FuzzTestRegistrationCtx<'a> {
         let tokens = quote!(
             #[::googletest::prelude::gtest]
             fn #gtest_name() {
-                // Note: In this setup, `module_path!()` returns a path that starts with the crate name
-                // (e.g., `crate_name::module::path`). We want to strip this prefix to make the
-                // test name similar to standard `libtest` paths.
-                let full_test_name = concat!(module_path!(), "::", #test_fn_name);
-                let test_name = full_test_name
-                    .split_once("::")
-                    .expect("Crate name is always the first path segment")
-                    .1;
+                let test_name = concat!(module_path!(), "::", #test_fn_name);
                 let manager = #crate_name::worker::RustFuzzTestAdapterManager {
                     test_name,
                     fuzz_test_factory: #fuzz_test_factory,
@@ -391,11 +384,7 @@ mod tests {
             gtest_tokens.to_string(),
             matchers::contains_substring(
                 quote! {
-                    let full_test_name = concat!(module_path!(), "::", "test_fuzz");
-                    let test_name = full_test_name
-                        .split_once("::")
-                        .expect("Crate name is always the first path segment")
-                        .1;
+                    let test_name = concat!(module_path!(), "::", "test_fuzz");
                 }
                 .to_string()
             )