Try using application default credentials (this definitely won't work)

tests/conftest.py

@@ -1,5 +1,4 @@
 import json
-import os
 import warnings
 from collections import UserDict
 from pathlib import Path
@@ -70,18 +69,7 @@ def pytest_sessionstart(session):
 
 
 def _init_ee_for_tests():
-    # Use the Github Service Account for CI tests
-    if os.environ.get("GITHUB_ACTIONS"):
-        key_data = os.environ.get("EE_SERVICE_ACCOUNT")
-        project_id = json.loads(key_data).get("project_id")
-        credentials = ee.ServiceAccountCredentials(None, key_data=key_data)
-    # Use stored persistent credentials for local tests
-    else:
-        # Project should be parsed from credentials
-        project_id = None
-        credentials = "persistent"
-
-    ee.Initialize(credentials, project=project_id)
+    ee.Initialize()
 
 
 @pytest.fixture(autouse=True)