diff --git a/trezor_agent/gpg/tests/test_proto.py b/trezor_agent/gpg/tests/test_proto.py
index 87e9d83..82af27b 100644
--- a/trezor_agent/gpg/tests/test_proto.py
+++ b/trezor_agent/gpg/tests/test_proto.py
@@ -76,6 +76,14 @@ def test_nist256p1():
     assert repr(pk) == 'GPG public key nist256p1/F82361D9'
 
 
+def test_nist256p1_ecdh():
+    sk = ecdsa.SigningKey.from_secret_exponent(secexp=1, curve=ecdsa.NIST256p)
+    vk = sk.get_verifying_key()
+    pk = proto.PublicKey(curve_name=formats.CURVE_NIST256,
+                         created=42, verifying_key=vk, ecdh=True)
+    assert repr(pk) == 'GPG public key nist256p1/5811DF46'
+
+
 def test_ed25519():
     sk = ed25519.SigningKey(b'\x00' * 32)
     vk = sk.get_verifying_key()