diff --git a/crates/wdk-sys/src/lib.rs b/crates/wdk-sys/src/lib.rs
index 5f12aaaf..633ba2b3 100644
--- a/crates/wdk-sys/src/lib.rs
+++ b/crates/wdk-sys/src/lib.rs
@@ -82,7 +82,7 @@ pub const fn NT_SUCCESS(nt_status: NTSTATUS) -> bool {
 /// See the [NTSTATUS reference](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/87fba13e-bf06-450e-83b1-9241dc81e781) and
 /// [Using NTSTATUS values](https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/using-ntstatus-values) for details.
 pub const fn NT_INFORMATION(nt_status: NTSTATUS) -> bool {
-    nt_status >> 30 == 1
+    (nt_status as u32 >> 30) == 1
 }
 
 #[must_use]
@@ -94,7 +94,7 @@ pub const fn NT_INFORMATION(nt_status: NTSTATUS) -> bool {
 /// See the [NTSTATUS reference](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/87fba13e-bf06-450e-83b1-9241dc81e781) and
 /// [Using NTSTATUS values](https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/using-ntstatus-values) for details.
 pub const fn NT_WARNING(nt_status: NTSTATUS) -> bool {
-    nt_status >> 30 == 2
+    (nt_status as u32 >> 30) == 2
 }
 
 #[must_use]
@@ -106,7 +106,7 @@ pub const fn NT_WARNING(nt_status: NTSTATUS) -> bool {
 /// See the [NTSTATUS reference](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/87fba13e-bf06-450e-83b1-9241dc81e781) and
 /// [Using NTSTATUS values](https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/using-ntstatus-values) for details.
 pub const fn NT_ERROR(nt_status: NTSTATUS) -> bool {
-    nt_status >> 30 == 3
+    (nt_status as u32 >> 30) == 3
 }
 
 #[allow(missing_docs)]
@@ -117,3 +117,28 @@ macro_rules! PAGED_CODE {
         debug_assert!(unsafe { KeGetCurrentIrql() <= APC_LEVEL as u8 });
     };
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::{
+        NT_ERROR,
+        NT_INFORMATION,
+        NT_SUCCESS,
+        NT_WARNING,
+        STATUS_BREAKPOINT,
+        STATUS_HIBERNATED,
+        STATUS_PRIVILEGED_INSTRUCTION,
+        STATUS_SUCCESS,
+    };
+    #[test]
+    pub fn status_tests() {
+        const {
+            assert!(NT_SUCCESS(STATUS_SUCCESS));
+            assert!(NT_SUCCESS(STATUS_HIBERNATED));
+            assert!(NT_INFORMATION(STATUS_HIBERNATED));
+            assert!(NT_WARNING(STATUS_BREAKPOINT));
+            assert!(NT_ERROR(STATUS_PRIVILEGED_INSTRUCTION));
+            assert!(!(NT_INFORMATION(STATUS_SUCCESS)));
+        }
+    }
+}