diff --git a/requirements-test.txt b/requirements-test.txt
index 285accd388..d85a5429a0 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -5,7 +5,6 @@ time-machine==2.13.0
 # for typing
 mypy==1.1.1
 types-python-dateutil==2.8.19.14
-types-python-jose==3.3.0
 types-pyyaml==6.0.12.20240808
 types-requests==2.32.0.20240907
 types-setuptools==74.1.0.20240907
diff --git a/requirements.txt b/requirements.txt
index f10d7be28e..542e63984f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,6 @@ google-cloud-storage==2.18.0
 googleapis-common-protos==1.63.2
 google-api-core==2.19.1
 honcho==1.1.0
-python-jose[cryptography]==3.3.0
 jsonschema==4.23.0
 fastjsonschema==2.16.2
 packaging==24.1
@@ -21,6 +20,7 @@ parsimonious==0.10.0
 progressbar2==4.2.0
 protobuf==5.27.3
 proto-plus==1.24.0
+pyjwt[crypto]==2.10.1
 pytest==7.1.3
 pytest-cov==4.1.0
 pytest-watch==4.2.0
diff --git a/snuba/admin/jwt.py b/snuba/admin/jwt.py
index d5d61b7b43..7ef602dbf8 100644
--- a/snuba/admin/jwt.py
+++ b/snuba/admin/jwt.py
@@ -1,5 +1,6 @@
 from typing import Any, Optional
 
+import jwt
 import requests
 
 from snuba import settings
@@ -32,7 +33,11 @@ def validate_assertion(assertion: str) -> AdminUser:
 
     If not, an exception will be raised
     """
-    from jose import jwt
-
-    info = jwt.decode(assertion, _certs(), algorithms=["ES256"], audience=_audience())
+    info = jwt.decode(
+        assertion,
+        _certs(),
+        algorithms=["ES256"],
+        audience=_audience(),
+        options={"verify_aud": True},
+    )
     return AdminUser(email=info["email"], id=info["sub"])
diff --git a/tests/admin/test_authorization.py b/tests/admin/test_authorization.py
index ea73fdd769..89e7d75341 100644
--- a/tests/admin/test_authorization.py
+++ b/tests/admin/test_authorization.py
@@ -9,13 +9,6 @@
 from snuba.admin.auth_roles import ROLES
 
 
-@pytest.fixture
-def admin_api() -> FlaskClient:
-    from snuba.admin.views import application
-
-    return application.test_client()
-
-
 @pytest.mark.redis_db
 def test_tools(admin_api: FlaskClient) -> None:
     response = admin_api.get("/tools")
@@ -28,9 +21,7 @@ def test_tools(admin_api: FlaskClient) -> None:
 
 @pytest.mark.redis_db
 @patch("snuba.admin.auth.DEFAULT_ROLES", [ROLES["ProductTools"]])
-def test_product_tools_role(
-    admin_api: FlaskClient,
-) -> None:
+def test_product_tools_role(admin_api: FlaskClient) -> None:
     response = admin_api.get("/tools")
     assert response.status_code == 200
     data = json.loads(response.data)
diff --git a/tests/admin/test_jwt.py b/tests/admin/test_jwt.py
new file mode 100644
index 0000000000..f0507d10ab
--- /dev/null
+++ b/tests/admin/test_jwt.py
@@ -0,0 +1,104 @@
+from datetime import datetime, timedelta, timezone
+from typing import Tuple
+from unittest.mock import MagicMock
+
+import jwt
+import pytest
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import ec
+
+from snuba.admin.jwt import validate_assertion
+from snuba.admin.user import AdminUser
+from tests.conftest import TEST_AUDIENCE, TEST_EMAIL, TEST_SUB, create_test_token
+
+
+def test_validate_assertion_success(
+    mock_settings: MagicMock,
+    mock_certs: MagicMock,
+    key_pair: Tuple[bytes, bytes],
+) -> None:
+    """Test that a valid JWT token is properly validated and returns an AdminUser"""
+    private_key, _ = key_pair
+    token = create_test_token(private_key)
+    user = validate_assertion(token)
+    assert isinstance(user, AdminUser)
+    assert user.email == TEST_EMAIL
+    assert user.id == TEST_SUB
+
+
+def test_validate_assertion_invalid_signature(
+    mock_settings: MagicMock,
+    mock_certs: MagicMock,
+) -> None:
+    """Test that an invalid signature raises an exception"""
+    # Create a different key pair for signing
+    different_private_key = ec.generate_private_key(ec.SECP256K1()).private_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PrivateFormat.PKCS8,
+        encryption_algorithm=serialization.NoEncryption(),
+    )
+    token = create_test_token(different_private_key)
+    with pytest.raises(jwt.InvalidSignatureError):
+        validate_assertion(token)
+
+
+def test_validate_assertion_expired(
+    mock_settings: MagicMock,
+    mock_certs: MagicMock,
+    key_pair: Tuple[bytes, bytes],
+) -> None:
+    """Test that an expired token raises an exception"""
+    private_key, _ = key_pair
+    token = create_test_token(private_key, exp_delta=timedelta(hours=-1))
+    with pytest.raises(jwt.ExpiredSignatureError):
+        validate_assertion(token)
+
+
+def test_validate_assertion_invalid_audience(
+    mock_settings: MagicMock,
+    mock_certs: MagicMock,
+    key_pair: Tuple[bytes, bytes],
+) -> None:
+    """Test that a token with wrong audience raises an exception"""
+    private_key, _ = key_pair
+    token = create_test_token(private_key, audience="wrong-audience")
+    with pytest.raises(jwt.InvalidAudienceError):
+        validate_assertion(token)
+
+
+def test_validate_assertion_missing_email(
+    mock_settings: MagicMock,
+    mock_certs: MagicMock,
+    key_pair: Tuple[bytes, bytes],
+) -> None:
+    """Test that a token without email claim raises an exception"""
+    private_key, _ = key_pair
+    now = datetime.now(timezone.utc)
+    payload = {
+        "sub": TEST_SUB,
+        "aud": TEST_AUDIENCE,
+        "exp": now + timedelta(hours=1),
+        "iat": now,
+    }
+    token = jwt.encode(payload, private_key.decode("utf-8"), algorithm="ES256")
+    with pytest.raises(KeyError):
+        validate_assertion(token)
+
+
+def test_validate_assertion_missing_sub(
+    mock_settings: MagicMock,
+    mock_certs: MagicMock,
+    key_pair: Tuple[bytes, bytes],
+) -> None:
+    """Test that a token without sub claim raises an exception"""
+    private_key, _ = key_pair
+    now = datetime.now(timezone.utc)
+    payload = {
+        "email": TEST_EMAIL,
+        "aud": TEST_AUDIENCE,
+        "exp": now + timedelta(hours=1),
+        "iat": now,
+    }
+    token = jwt.encode(payload, private_key.decode("utf-8"), algorithm="ES256")
+    with pytest.raises(KeyError):
+        validate_assertion(token)
diff --git a/tests/conftest.py b/tests/conftest.py
index a913e7376a..4313f37106 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,8 +1,14 @@
 import json
 import traceback
+from datetime import datetime, timedelta, timezone
 from typing import Any, Callable, Dict, Generator, List, Sequence, Tuple, Union
+from unittest.mock import MagicMock, patch
 
+import jwt
 import pytest
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import ec
+from flask.testing import FlaskClient
 from snuba_sdk.legacy import json_to_snql
 
 from snuba import settings, state
@@ -48,9 +54,11 @@ def create_databases() -> None:
             storage_sets=cluster["storage_sets"],
             single_node=cluster["single_node"],
             cluster_name=cluster["cluster_name"] if "cluster_name" in cluster else None,
-            distributed_cluster_name=cluster["distributed_cluster_name"]
-            if "distributed_cluster_name" in cluster
-            else None,
+            distributed_cluster_name=(
+                cluster["distributed_cluster_name"]
+                if "distributed_cluster_name" in cluster
+                else None
+            ),
         )
 
         database_name = cluster["database"]
@@ -299,3 +307,79 @@ def set_config(key: str, value: Any) -> None:
 def disable_query_cache(snuba_set_config: SnubaSetConfig, redis_db: None) -> None:
     snuba_set_config("use_cache", False)
     snuba_set_config("use_readthrough_query_cache", 0)
+
+
+# JWT Test constants
+TEST_AUDIENCE = "test-audience"
+TEST_EMAIL = "test@example.com"
+TEST_SUB = "12345"
+
+
+@pytest.fixture
+def key_pair() -> tuple[bytes, bytes]:
+    """Generate a fresh ES256 key pair for each test run"""
+    private_key = ec.generate_private_key(ec.SECP256K1())
+    public_key = private_key.public_key()
+
+    # Convert to PEM format
+    private_pem = private_key.private_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PrivateFormat.PKCS8,
+        encryption_algorithm=serialization.NoEncryption(),
+    )
+    public_pem = public_key.public_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PublicFormat.SubjectPublicKeyInfo,
+    )
+
+    return private_pem, public_pem
+
+
+@pytest.fixture
+def mock_settings() -> Generator[MagicMock, None, None]:
+    with patch("snuba.admin.jwt.settings") as mock_settings:
+        mock_settings.ADMIN_AUTH_JWT_AUDIENCE = TEST_AUDIENCE
+        yield mock_settings
+
+
+@pytest.fixture
+def mock_certs(key_pair: tuple[bytes, bytes]) -> Generator[MagicMock, None, None]:
+    _, public_key = key_pair
+    with patch("snuba.admin.jwt._certs") as mock_certs:
+        mock_certs.return_value = public_key.decode("utf-8")
+        yield mock_certs
+
+
+@pytest.fixture
+def admin_api(
+    mock_settings: MagicMock, mock_certs: MagicMock, key_pair: tuple[bytes, bytes]
+) -> FlaskClient:
+    """Returns a Flask test client with valid JWT authentication"""
+    with patch("snuba.admin.auth.settings.ADMIN_AUTH_PROVIDER", "IAP"):
+        from snuba.admin.views import application
+
+        private_key, _ = key_pair
+        token = create_test_token(private_key)
+        client = application.test_client()
+        client.environ_base["HTTP_X_GOOG_IAP_JWT_ASSERTION"] = token
+        return client
+
+
+def create_test_token(
+    private_key: bytes,
+    *,
+    email: str = TEST_EMAIL,
+    sub: str = TEST_SUB,
+    audience: str = TEST_AUDIENCE,
+    exp_delta: timedelta = timedelta(hours=1),
+) -> str:
+    """Helper function to create a test JWT token"""
+    now = datetime.now(timezone.utc)
+    payload = {
+        "email": email,
+        "sub": sub,
+        "aud": audience,
+        "exp": now + exp_delta,
+        "iat": now,
+    }
+    return jwt.encode(payload, private_key.decode("utf-8"), algorithm="ES256")