diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e827f147f..e352385c8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ env:
   RUST_BACKTRACE: 1
   RUSTUP_WINDOWS_PATH_ADD_BIN: 1
   # Change to specific Rust release to pin
-  rust_stable: '1.93.1'
+  rust_stable: stable
   rust_nightly: nightly-2025-10-12
   # Pin a specific miri version
   rust_miri_nightly: nightly-2025-11-13
@@ -1057,6 +1057,8 @@ jobs:
         target:
           - wasm32-wasip1
           - wasm32-wasip1-threads
+    env:
+      rust_stable: '1.93.1'
     steps:
       - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
diff --git a/tokio/src/fs/open_options.rs b/tokio/src/fs/open_options.rs
index 27e98b5b2..ee88c380a 100644
--- a/tokio/src/fs/open_options.rs
+++ b/tokio/src/fs/open_options.rs
@@ -16,9 +16,9 @@ use mock_open_options::MockOpenOptions as StdOpenOptions;
 #[cfg(not(test))]
 use std::fs::OpenOptions as StdOpenOptions;
 
-#[cfg(unix)]
+#[cfg(all(unix, not(test)))]
 use std::os::unix::fs::OpenOptionsExt;
-#[cfg(windows)]
+#[cfg(all(windows, not(test)))]
 use std::os::windows::fs::OpenOptionsExt;
 
 /// Options and flags which can be used to configure how a file is opened.
diff --git a/tokio/src/fs/open_options/mock_open_options.rs b/tokio/src/fs/open_options/mock_open_options.rs
index 2fbdd282a..0ff4c8bc9 100644
--- a/tokio/src/fs/open_options/mock_open_options.rs
+++ b/tokio/src/fs/open_options/mock_open_options.rs
@@ -3,10 +3,6 @@
 use mockall::mock;
 
 use crate::fs::mocks::MockFile;
-#[cfg(unix)]
-use std::os::unix::fs::OpenOptionsExt;
-#[cfg(windows)]
-use std::os::windows::fs::OpenOptionsExt;
 use std::{io, path::Path};
 
 mock! {
@@ -19,21 +15,25 @@ mock! {
         pub fn read(&mut self, read: bool) -> &mut Self;
         pub fn truncate(&mut self, truncate: bool) -> &mut Self;
         pub fn write(&mut self, write: bool) -> &mut Self;
+
+        // Not mocking OpenOptionsExt trait due to:
+        // https://github.com/rust-lang/rust/issues/153486
+        #[cfg(unix)]
+        pub fn custom_flags(&mut self, flags: i32) -> &mut Self;
+        #[cfg(unix)]
+        pub fn mode(&mut self, mode: u32) -> &mut Self;
+        #[cfg(windows)]
+        pub fn access_mode(&mut self, access: u32) -> &mut Self;
+        #[cfg(windows)]
+        pub fn share_mode(&mut self, val: u32) -> &mut Self;
+        #[cfg(windows)]
+        pub fn custom_flags(&mut self, flags: u32) -> &mut Self;
+        #[cfg(windows)]
+        pub fn attributes(&mut self, val: u32) -> &mut Self;
+        #[cfg(windows)]
+        pub fn security_qos_flags(&mut self, flags: u32) -> &mut Self;
     }
     impl Clone for OpenOptions {
         fn clone(&self) -> Self;
     }
-    #[cfg(unix)]
-    impl OpenOptionsExt for OpenOptions {
-        fn custom_flags(&mut self, flags: i32) -> &mut Self;
-        fn mode(&mut self, mode: u32) -> &mut Self;
-    }
-    #[cfg(windows)]
-    impl OpenOptionsExt for OpenOptions {
-        fn access_mode(&mut self, access: u32) -> &mut Self;
-        fn share_mode(&mut self, val: u32) -> &mut Self;
-        fn custom_flags(&mut self, flags: u32) -> &mut Self;
-        fn attributes(&mut self, val: u32) -> &mut Self;
-        fn security_qos_flags(&mut self, flags: u32) -> &mut Self;
-    }
 }
diff --git a/tokio/src/fs/open_options/uring_open_options.rs b/tokio/src/fs/open_options/uring_open_options.rs
index 48297ca3b..4e7660413 100644
--- a/tokio/src/fs/open_options/uring_open_options.rs
+++ b/tokio/src/fs/open_options/uring_open_options.rs
@@ -1,4 +1,7 @@
-use std::{io, os::unix::fs::OpenOptionsExt};
+use std::io;
+
+#[cfg(not(test))]
+use std::os::unix::fs::OpenOptionsExt;
 
 #[cfg(test)]
 use super::mock_open_options::MockOpenOptions as StdOpenOptions;