diff --git a/turbopack/crates/turbo-tasks-macros-tests/tests/trybuild.rs b/turbopack/crates/turbo-tasks-macros-tests/tests/trybuild.rs
index d1dbc7db51f8..314299db6f6a 100644
--- a/turbopack/crates/turbo-tasks-macros-tests/tests/trybuild.rs
+++ b/turbopack/crates/turbo-tasks-macros-tests/tests/trybuild.rs
@@ -8,37 +8,19 @@ fn unset_rustc_wrapper() {
     unsafe { std::env::remove_var("RUSTC_WRAPPER") };
 }
 
+// Trybuild uses one generated Cargo project per package. Keep every case in one test so nextest
+// cannot run separate processes that overwrite that project's manifest while another case uses it.
 #[test]
-fn derive_operation_value() {
+fn trybuild() {
     let t = trybuild::TestCases::new();
     t.pass("tests/derive_operation_value/pass_*.rs");
     t.compile_fail("tests/derive_operation_value/fail_*.rs");
-}
-
-#[test]
-fn derive_non_local_value() {
-    let t = trybuild::TestCases::new();
     t.pass("tests/derive_non_local_value/pass_*.rs");
     t.compile_fail("tests/derive_non_local_value/fail_*.rs");
-}
-
-#[test]
-fn function() {
-    let t = trybuild::TestCases::new();
     t.pass("tests/function/pass_*.rs");
     t.compile_fail("tests/function/fail_*.rs");
-}
-
-#[test]
-fn value() {
-    let t = trybuild::TestCases::new();
     t.pass("tests/value/pass_*.rs");
     t.compile_fail("tests/value/fail_*.rs");
-}
-
-#[test]
-fn value_trait() {
-    let t = trybuild::TestCases::new();
     t.pass("tests/value_trait/pass_*.rs");
     t.compile_fail("tests/value_trait/fail_*.rs");
 }