diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 118f48a702..c985f319bf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,11 +16,8 @@ jobs:
       fail-fast: false
       matrix:
         # macos-13 is x86; macos-14 is ARM
-        os: [ubuntu-latest, macos-13, macos-14, windows-latest]
+        os: [windows-latest]
         cargo_flags: [""]
-        include:
-        - os: ubuntu-latest
-          cargo_flags: "--all-features"
     runs-on: ${{ matrix.os }}
 
     # TODO FIXME (aseipp): keep the timeout limit to ~15 minutes. this is long
@@ -71,7 +68,7 @@ jobs:
     - name: Build
       run: cargo build --workspace --all-targets --verbose ${{ matrix.cargo_flags }}
     - name: Test
-      run: cargo test --workspace --all-targets --verbose ${{ matrix.cargo_flags }}
+      run: cargo test --workspace --all-targets --verbose ${{ matrix.cargo_flags }} --no-fail-fast
       env:
         RUST_BACKTRACE: 1
 
diff --git a/lib/tests/test_local_working_copy.rs b/lib/tests/test_local_working_copy.rs
index e00f4eea6d..49fabf620d 100644
--- a/lib/tests/test_local_working_copy.rs
+++ b/lib/tests/test_local_working_copy.rs
@@ -1633,6 +1633,14 @@ fn test_check_out_reserved_file_path_vfat(file_path_str: &str) {
     let workspace_root = test_workspace.workspace.workspace_root().to_owned();
     std::fs::create_dir(workspace_root.join(".git")).unwrap();
     let is_vfat = check_vfat(&workspace_root);
+    if is_vfat {
+        for i in 0..=9 {
+            for name in ["GIT", "JJ"] {
+                let path = workspace_root.join(format!("{name}~{i}"));
+                eprintln!("XXX {} {}", path.display(), path.exists());
+            }
+        }
+    }
 
     let file_path = RepoPath::from_internal_string(file_path_str);
     let disk_path = file_path.to_fs_path_unchecked(&workspace_root);