diff --git a/tvix/eval/build.rs b/tvix/eval/build.rs
index a9c9a78b0..b37a6e8a0 100644
--- a/tvix/eval/build.rs
+++ b/tvix/eval/build.rs
@@ -5,5 +5,10 @@ fn main() {
         "cargo:rustc-env=TVIX_CURRENT_SYSTEM={}",
         &env::var("TARGET").unwrap()
     );
-    println!("cargo:rerun-if-changed-env=TARGET")
+    println!("cargo:rerun-if-changed-env=TARGET");
+
+    // Pick up new test case files
+    // https://github.com/la10736/rstest/issues/256
+    println!("cargo:rerun-if-changed=src/tests/nix_tests");
+    println!("cargo:rerun-if-changed=src/tests/tvix_tests")
 }
diff --git a/tvix/glue/build.rs b/tvix/glue/build.rs
new file mode 100644
index 000000000..544c34a6c
--- /dev/null
+++ b/tvix/glue/build.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // Pick up new test case files
+    // https://github.com/la10736/rstest/issues/256
+    println!("cargo:rerun-if-changed=src/tests/nix_tests");
+    println!("cargo:rerun-if-changed=src/tests/tvix_tests")
+}
diff --git a/tvix/nix-compat/build.rs b/tvix/nix-compat/build.rs
new file mode 100644
index 000000000..c66b97016
--- /dev/null
+++ b/tvix/nix-compat/build.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // Pick up new test case files
+    // https://github.com/la10736/rstest/issues/256
+    println!("cargo:rerun-if-changed=src/derivation/tests/derivation_tests")
+}