diff --git a/.github/actions/rust-test/action.yaml b/.github/actions/rust-test/action.yaml
index 4ff144eb6..a1cde99ba 100644
--- a/.github/actions/rust-test/action.yaml
+++ b/.github/actions/rust-test/action.yaml
@@ -62,6 +62,5 @@ runs:
     - name: Run Cargo test
       shell: bash
       run: |
-        ulimit -n 102400
         cd native
         RUST_BACKTRACE=1 cargo test
diff --git a/native/core/src/execution/datafusion/shuffle_writer.rs b/native/core/src/execution/datafusion/shuffle_writer.rs
index f0078e883..46c3d4995 100644
--- a/native/core/src/execution/datafusion/shuffle_writer.rs
+++ b/native/core/src/execution/datafusion/shuffle_writer.rs
@@ -1598,6 +1598,7 @@ mod test {
 
     #[test]
     #[cfg_attr(miri, ignore)] // miri can't call foreign function `ZSTD_createCCtx`
+    #[cfg(not(target_os = "macos"))] // Github MacOS runner fails with "Too many open files".
     fn test_large_number_of_partitions() {
         shuffle_write_test(10000, 10, 200, Some(10 * 1024 * 1024));
         shuffle_write_test(10000, 10, 2000, Some(10 * 1024 * 1024));
@@ -1605,6 +1606,7 @@ mod test {
 
     #[test]
     #[cfg_attr(miri, ignore)] // miri can't call foreign function `ZSTD_createCCtx`
+    #[cfg(not(target_os = "macos"))] // Github MacOS runner fails with "Too many open files".
     fn test_large_number_of_partitions_spilling() {
         shuffle_write_test(10000, 100, 200, Some(10 * 1024 * 1024));
     }