diff --git a/lib/crates/fabro-test/src/lib.rs b/lib/crates/fabro-test/src/lib.rs
index b034f11e1..5107dfdf9 100644
--- a/lib/crates/fabro-test/src/lib.rs
+++ b/lib/crates/fabro-test/src/lib.rs
@@ -1737,7 +1737,10 @@ mod tests {
     fn run_and_create_commands_include_test_labels() {
         let _lock = env_lock().lock().expect("env lock poisoned");
         let _guard = EnvGuard::set("NEXTEST_RUN_ID", Some("run-cmd-labels"));
-        let context = TestContext::new(PathBuf::from("/tmp/fabro"));
+        let missing_bin_root = tempfile::tempdir().expect("failed to create temp dir");
+        // Keep the binary path missing so this unit test never bootstraps a
+        // shared server based on ambient filesystem state at /tmp/fabro.
+        let context = TestContext::new(missing_bin_root.path().join("fabro"));
 
         let run_args = context
             .run_cmd()