diff --git a/proxmox-shared-memory/src/lib.rs b/proxmox-shared-memory/src/lib.rs
index 3ab98cf7..7edfca60 100644
--- a/proxmox-shared-memory/src/lib.rs
+++ b/proxmox-shared-memory/src/lib.rs
@@ -102,7 +102,7 @@ impl<T: Sized + Init> SharedMemory<T> {
             .ok_or_else(|| format_err!("bad path {:?}", path))?
             .to_owned();
 
-        if !cfg!(test) {
+        if !dir_name.ends_with("shmemtest") {
             let statfs = nix::sys::statfs::statfs(&dir_name)?;
             if statfs.filesystem_type() != nix::sys::statfs::TMPFS_MAGIC {
                 bail!("path {:?} is not on tmpfs", dir_name);
@@ -211,159 +211,4 @@ pub unsafe fn initialize_subtype<T: Init>(this: &mut T) {
 pub unsafe fn check_subtype<T: Init>(this: &T) -> Result<(), Error> {
     let data: &MaybeUninit<T> = std::mem::transmute(this);
     Init::check_type_magic(data)
-}
-
-#[cfg(test)]
-mod test {
-
-    use super::*;
-
-    use proxmox_sys::fs::create_path;
-    use std::sync::atomic::AtomicU64;
-    use std::sync::Arc;
-    use std::thread::spawn;
-
-    #[derive(Debug)]
-    #[repr(C)]
-    struct TestData {
-        count: u64,
-        value1: u64,
-        value2: u64,
-    }
-
-    impl Init for TestData {
-        fn initialize(this: &mut MaybeUninit<Self>) {
-            this.write(Self {
-                count: 0,
-                value1: 0xffff_ffff_ffff_0000,
-                value2: 0x0000_ffff_ffff_ffff,
-            });
-        }
-    }
-
-    struct SingleMutexData {
-        data: SharedMutex<TestData>,
-        _padding: [u8; 4096 - 64 - 8],
-    }
-
-    impl Init for SingleMutexData {
-        fn initialize(this: &mut MaybeUninit<Self>) {
-            unsafe {
-                let me = &mut *this.as_mut_ptr();
-                initialize_subtype(&mut me.data);
-            }
-        }
-
-        fn check_type_magic(this: &MaybeUninit<Self>) -> Result<(), Error> {
-            unsafe {
-                let me = &*this.as_ptr();
-                check_subtype(&me.data)
-            }
-        }
-    }
-
-    #[test]
-    fn test_shared_memory_mutex() -> Result<(), Error> {
-        create_path("../target/testdata/", None, None)?;
-
-        let shared: SharedMemory<SingleMutexData> = SharedMemory::open(
-            Path::new("../target/testdata/test1.shm"),
-            CreateOptions::new(),
-        )?;
-
-        let shared = Arc::new(shared);
-
-        let start = shared.data().data.lock().count;
-
-        let threads: Vec<_> = (0..100)
-            .map(|_| {
-                let shared = shared.clone();
-                spawn(move || {
-                    let mut guard = shared.data().data.lock();
-                    println!("DATA {:?}", *guard);
-                    guard.count += 1;
-                    println!("DATA {:?}", *guard);
-                })
-            })
-            .collect();
-
-        for thread in threads {
-            thread.join().unwrap();
-        }
-
-        let end = shared.data().data.lock().count;
-
-        assert_eq!(end - start, 100);
-
-        Ok(())
-    }
-
-    #[derive(Debug)]
-    #[repr(C)]
-    struct MultiMutexData {
-        acount: AtomicU64,
-        block1: SharedMutex<TestData>,
-        block2: SharedMutex<TestData>,
-        padding: [u8; 4096 - 136 - 16],
-    }
-
-    impl Init for MultiMutexData {
-        fn initialize(this: &mut MaybeUninit<Self>) {
-            unsafe {
-                let me = &mut *this.as_mut_ptr();
-                initialize_subtype(&mut me.block1);
-                initialize_subtype(&mut me.block2);
-            }
-        }
-
-        fn check_type_magic(this: &MaybeUninit<Self>) -> Result<(), Error> {
-            unsafe {
-                let me = &*this.as_ptr();
-                check_subtype(&me.block1)?;
-                check_subtype(&me.block2)?;
-                Ok(())
-            }
-        }
-    }
-
-    #[test]
-    fn test_shared_memory_multi_mutex() -> Result<(), Error> {
-        create_path("../target/testdata/", None, None)?;
-
-        let shared: SharedMemory<MultiMutexData> = SharedMemory::open(
-            Path::new("../target/testdata/test2.shm"),
-            CreateOptions::new(),
-        )?;
-
-        let shared = Arc::new(shared);
-
-        let start1 = shared.data().block1.lock().count;
-        let start2 = shared.data().block2.lock().count;
-
-        let threads: Vec<_> = (0..100)
-            .map(|_| {
-                let shared = shared.clone();
-                spawn(move || {
-                    let mut guard = shared.data().block1.lock();
-                    println!("BLOCK1 {:?}", *guard);
-                    guard.count += 1;
-                    let mut guard = shared.data().block2.lock();
-                    println!("BLOCK2 {:?}", *guard);
-                    guard.count += 2;
-                })
-            })
-            .collect();
-
-        for thread in threads {
-            thread.join().unwrap();
-        }
-
-        let end1 = shared.data().block1.lock().count;
-        assert_eq!(end1 - start1, 100);
-
-        let end2 = shared.data().block2.lock().count;
-        assert_eq!(end2 - start2, 200);
-
-        Ok(())
-    }
-}
+}
\ No newline at end of file
diff --git a/proxmox-shared-memory/tests/raw_shared_mutex.rs b/proxmox-shared-memory/tests/raw_shared_mutex.rs
new file mode 100644
index 00000000..fc46a8db
--- /dev/null
+++ b/proxmox-shared-memory/tests/raw_shared_mutex.rs
@@ -0,0 +1,175 @@
+use std::path::PathBuf;
+use std::{mem::MaybeUninit, sync::Arc, thread::spawn};
+
+use anyhow::Error;
+use nix::fcntl::OFlag;
+use nix::sys::stat::Mode;
+use nix::unistd::mkdir;
+use proxmox_shared_memory::{check_subtype, initialize_subtype, Init, SharedMemory, SharedMutex};
+use proxmox_sys::fs::CreateOptions;
+
+use std::sync::atomic::AtomicU64;
+
+#[derive(Debug)]
+#[repr(C)]
+struct TestData {
+    count: u64,
+    value1: u64,
+    value2: u64,
+}
+
+impl Init for TestData {
+    fn initialize(this: &mut MaybeUninit<Self>) {
+        this.write(Self {
+            count: 0,
+            value1: 0xffff_ffff_ffff_0000,
+            value2: 0x0000_ffff_ffff_ffff,
+        });
+    }
+}
+
+struct SingleMutexData {
+    data: SharedMutex<TestData>,
+    _padding: [u8; 4096 - 64 - 8],
+}
+
+impl Init for SingleMutexData {
+    fn initialize(this: &mut MaybeUninit<Self>) {
+        unsafe {
+            let me = &mut *this.as_mut_ptr();
+            initialize_subtype(&mut me.data);
+        }
+    }
+
+    fn check_type_magic(this: &MaybeUninit<Self>) -> Result<(), Error> {
+        unsafe {
+            let me = &*this.as_ptr();
+            check_subtype(&me.data)
+        }
+    }
+}
+
+#[derive(Debug)]
+#[repr(C)]
+struct MultiMutexData {
+    acount: AtomicU64,
+    block1: SharedMutex<TestData>,
+    block2: SharedMutex<TestData>,
+    padding: [u8; 4096 - 136 - 16],
+}
+
+impl Init for MultiMutexData {
+    fn initialize(this: &mut MaybeUninit<Self>) {
+        unsafe {
+            let me = &mut *this.as_mut_ptr();
+            initialize_subtype(&mut me.block1);
+            initialize_subtype(&mut me.block2);
+        }
+    }
+
+    fn check_type_magic(this: &MaybeUninit<Self>) -> Result<(), Error> {
+        unsafe {
+            let me = &*this.as_ptr();
+            check_subtype(&me.block1)?;
+            check_subtype(&me.block2)?;
+            Ok(())
+        }
+    }
+}
+
+fn create_test_dir<T: Init>(filename: &str) -> Option<PathBuf> {
+    let test_dir: String = env!("CARGO_TARGET_TMPDIR").to_string();
+
+    let mut path = PathBuf::from(&test_dir);
+    path.push("shmemtest");
+    let _ = mkdir(&path, Mode::S_IRWXU);
+    path.push(filename);
+
+    let oflag = OFlag::O_RDWR | OFlag::O_CLOEXEC;
+
+    // check for O_TMPFILE support
+    if let Err(nix::Error::Sys(nix::errno::Errno::EOPNOTSUPP)) = nix::fcntl::open(
+        path.parent().unwrap(),
+        oflag | OFlag::O_TMPFILE,
+        Mode::empty(),
+    ) {
+        return None;
+    }
+
+    Some(path)
+}
+#[test]
+fn test_shared_memory_mutex() -> Result<(), Error> {
+    let path = match create_test_dir::<SingleMutexData>(&"data1.shm") {
+        None => { return Ok(()); }, // no O_TMPFILE support, can't run test
+        Some(path) => path,
+    };
+
+    let shared: SharedMemory<SingleMutexData> = SharedMemory::open(&path, CreateOptions::new())?;
+
+    let shared = Arc::new(shared);
+
+    let start = shared.data().data.lock().count;
+
+    let threads: Vec<_> = (0..100)
+        .map(|_| {
+            let shared = shared.clone();
+            spawn(move || {
+                let mut guard = shared.data().data.lock();
+                println!("DATA {:?}", *guard);
+                guard.count += 1;
+                println!("DATA {:?}", *guard);
+            })
+        })
+        .collect();
+
+    for thread in threads {
+        thread.join().unwrap();
+    }
+
+    let end = shared.data().data.lock().count;
+
+    assert_eq!(end - start, 100);
+
+    Ok(())
+}
+
+#[test]
+fn test_shared_memory_multi_mutex() -> Result<(), Error> {
+    let path = match create_test_dir::<SingleMutexData>(&"data2.shm") {
+        None => { return Ok(()); }, // no O_TMPFILE support, can't run test
+        Some(path) => path,
+    };
+    let shared: SharedMemory<MultiMutexData> = SharedMemory::open(&path, CreateOptions::new())?;
+
+    let shared = Arc::new(shared);
+
+    let start1 = shared.data().block1.lock().count;
+    let start2 = shared.data().block2.lock().count;
+
+    let threads: Vec<_> = (0..100)
+        .map(|_| {
+            let shared = shared.clone();
+            spawn(move || {
+                let mut guard = shared.data().block1.lock();
+                println!("BLOCK1 {:?}", *guard);
+                guard.count += 1;
+                let mut guard = shared.data().block2.lock();
+                println!("BLOCK2 {:?}", *guard);
+                guard.count += 2;
+            })
+        })
+        .collect();
+
+    for thread in threads {
+        thread.join().unwrap();
+    }
+
+    let end1 = shared.data().block1.lock().count;
+    assert_eq!(end1 - start1, 100);
+
+    let end2 = shared.data().block2.lock().count;
+    assert_eq!(end2 - start2, 200);
+
+    Ok(())
+}