diff --git a/apps/desktop/desktop_native/win_webauthn/src/plugin/crypto.rs b/apps/desktop/desktop_native/win_webauthn/src/plugin/crypto.rs
index 0060448c72f..727e8435ac5 100644
--- a/apps/desktop/desktop_native/win_webauthn/src/plugin/crypto.rs
+++ b/apps/desktop/desktop_native/win_webauthn/src/plugin/crypto.rs
@@ -366,7 +366,10 @@ impl AsRef<[u8]> for VerifyingKey {
 mod tests {
     use std::ptr::NonNull;
 
-    use windows::Win32::Security::Cryptography::{BCRYPT_RSAKEY_BLOB, BCRYPT_RSAPUBLIC_MAGIC};
+    use windows::Win32::Security::Cryptography::{
+        BCRYPT_ECCKEY_BLOB, BCRYPT_ECDSA_PUBLIC_P384_MAGIC, BCRYPT_RSAKEY_BLOB,
+        BCRYPT_RSAPUBLIC_MAGIC,
+    };
 
     use crate::plugin::crypto::{verify_signature, VerifyingKey};
 
@@ -496,4 +499,77 @@ mod tests {
         };
         verify_signature(&verify_key, digest, signature).expect("a signature to verify properly");
     }
+
+    #[test]
+    fn test_p384_signature_verifies_properly() {
+        // SHA-256 hash of "abc"
+        let digest = &[
+            0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea, 0x41, 0x41, 0x40, 0xde, 0x5d, 0xae,
+            0x22, 0x23, 0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c, 0xb4, 0x10, 0xff, 0x61,
+            0xf2, 0x00, 0x15, 0xad,
+        ];
+        /*
+        Test private key used to create expected signature, generated by OpenSSL
+
+        -----BEGIN PRIVATE KEY-----
+        MIICDAIBADCCAWQGByqGSM49AgEwggFXAgEBMDwGByqGSM49AQECMQD/////////
+        /////////////////////////////////v////8AAAAAAAAAAP////8wewQw////
+        //////////////////////////////////////7/////AAAAAAAAAAD////8BDCz
+        MS+n4j7n5JiOBWvj+C0ZGB2cbv6BQRIDFAiPUBOHWsZWOY2KLtGdKoXI7dPsKu8D
+        FQCjNZJqoxmieh0AiWpnc6SCes2scwRhBKqHyiK+iwU3jrHHHvMgrXRuHTtii6eb
+        mFn3QeCCVCo4VQLyXb9VKWw6VF44cnYKtzYX3kqWJixvXZ6Yv5KS3Cn49B29KJoU
+        fOnaMRO18LjACmCxzh1+gZ16Qx18kOoOXwIxAP//////////////////////////
+        /////8djTYH0Ny3fWBoNskiwp3rs7BlqzMUpcwIBAQSBnjCBmwIBAQQwhL/0kQDy
+        6VNH5op7R6mvyUth/0KXz7+/3E4bAW1bDngC/TTDdUL1mTL1i4iN0j+AoWQDYgAE
+        ub2c2ielLaE8+cCrwjw1LV8AGTLLz9yxLjSiJgPOfwHYCXP+wKVU1hsurlCYnQdn
+        7Kkj5uCTLDspCY+PIM2QQ6t246no9d/FeujLzv/GHP9K+QsC/qjbQ+WGJ4m5dGTo
+        -----END PRIVATE KEY-----
+
+        Signature generated with:
+        openssl pkeyutl -sign -inkey p384.key.pem -in hash.bin -out sig_der.bin
+        Converted from DER to IEEE P1363 (r || s) format.
+         */
+        // P-384 public key X coordinate (48 bytes, big-endian)
+        let x: &[u8] = &[
+            0xb9, 0xbd, 0x9c, 0xda, 0x27, 0xa5, 0x2d, 0xa1, 0x3c, 0xf9, 0xc0, 0xab, 0xc2, 0x3c,
+            0x35, 0x2d, 0x5f, 0x00, 0x19, 0x32, 0xcb, 0xcf, 0xdc, 0xb1, 0x2e, 0x34, 0xa2, 0x26,
+            0x03, 0xce, 0x7f, 0x01, 0xd8, 0x09, 0x73, 0xfe, 0xc0, 0xa5, 0x54, 0xd6, 0x1b, 0x2e,
+            0xae, 0x50, 0x98, 0x9d, 0x07, 0x67,
+        ];
+        // P-384 public key Y coordinate (48 bytes, big-endian)
+        let y: &[u8] = &[
+            0xec, 0xa9, 0x23, 0xe6, 0xe0, 0x93, 0x2c, 0x3b, 0x29, 0x09, 0x8f, 0x8f, 0x20, 0xcd,
+            0x90, 0x43, 0xab, 0x76, 0xe3, 0xa9, 0xe8, 0xf5, 0xdf, 0xc5, 0x7a, 0xe8, 0xcb, 0xce,
+            0xff, 0xc6, 0x1c, 0xff, 0x4a, 0xf9, 0x0b, 0x02, 0xfe, 0xa8, 0xdb, 0x43, 0xe5, 0x86,
+            0x27, 0x89, 0xb9, 0x74, 0x64, 0xe8,
+        ];
+        let key_header = BCRYPT_ECCKEY_BLOB {
+            dwMagic: BCRYPT_ECDSA_PUBLIC_P384_MAGIC,
+            cbKey: 48, // P-384: 384 bits / 8 = 48 bytes per coordinate
+        };
+        let mut public_key_bytes: Vec<u8> = unsafe {
+            std::slice::from_raw_parts(
+                std::ptr::from_ref(&key_header).cast::<u8>(),
+                std::mem::size_of::<BCRYPT_ECCKEY_BLOB>(),
+            )
+        }
+        .to_vec();
+        public_key_bytes.extend_from_slice(x);
+        public_key_bytes.extend_from_slice(y);
+        let verify_key = VerifyingKey {
+            cbPublicKey: public_key_bytes.len() as u32,
+            pbPublicKey: NonNull::new(public_key_bytes.as_mut_ptr().cast()).unwrap(),
+        };
+        // ECDSA signature in IEEE P1363 format (r || s), each 48 bytes, big-endian
+        let signature: &[u8] = &[
+            0x2b, 0xc0, 0x76, 0x7f, 0x79, 0x82, 0xec, 0x5f, 0xd2, 0xe9, 0xd1, 0x68, 0x37, 0x5f,
+            0x6c, 0x2b, 0x14, 0xda, 0x27, 0x81, 0xed, 0x91, 0x88, 0x9e, 0x1c, 0x0a, 0x5e, 0xfd,
+            0x8d, 0xfb, 0xca, 0x3b, 0x31, 0x0e, 0x06, 0x48, 0x42, 0x75, 0xcd, 0x29, 0xd9, 0x23,
+            0x76, 0xf9, 0xcf, 0x6f, 0x37, 0xa1, 0xb7, 0x73, 0x1c, 0xc4, 0xba, 0xa8, 0x16, 0x8f,
+            0xd7, 0xef, 0x9b, 0x67, 0x6d, 0xab, 0x61, 0x62, 0x02, 0x3c, 0x64, 0xb5, 0x72, 0xe0,
+            0xcf, 0x86, 0xa7, 0x04, 0x78, 0x74, 0xb8, 0x68, 0x92, 0x46, 0x61, 0x14, 0xfd, 0x2b,
+            0xa4, 0x28, 0x2a, 0xb9, 0x6d, 0x05, 0xf4, 0x61, 0xf2, 0x76, 0x32, 0x8c,
+        ];
+        verify_signature(&verify_key, digest, signature).expect("a signature to verify properly");
+    }
 }