diff --git a/amber/pyproject.toml b/amber/pyproject.toml
index dd9f2f939e4..bfa83112bc0 100644
--- a/amber/pyproject.toml
+++ b/amber/pyproject.toml
@@ -42,4 +42,9 @@ testpaths = ["src/test/python"]
 addopts = "--import-mode=importlib"
 markers = [
     "integration: end-to-end test routed to the amber-integration CI job",
-]
\ No newline at end of file
+]
+# `fs` pulls in pkg_resources at import time (#4199); the same filter lives in
+# texera_run_python_worker.py for spawned workers.
+filterwarnings = [
+    "ignore:pkg_resources is deprecated as an API.*:UserWarning",
+]
diff --git a/amber/src/main/python/texera_run_python_worker.py b/amber/src/main/python/texera_run_python_worker.py
index 1e131d45739..d6b447db483 100644
--- a/amber/src/main/python/texera_run_python_worker.py
+++ b/amber/src/main/python/texera_run_python_worker.py
@@ -18,8 +18,19 @@
 import base64
 import json
 import sys
+import warnings
 from loguru import logger
 
+# `fs` (imported transitively by the core import below) pulls in pkg_resources
+# at import time (#4199), which emits this deprecation warning on stderr in
+# every spawned worker. It is not actionable on our side, so filter it before
+# the import chain runs. Mirrored for pytest in amber/pyproject.toml.
+warnings.filterwarnings(
+    "ignore",
+    message="pkg_resources is deprecated as an API.*",
+    category=UserWarning,
+)
+
 try:
     from core.python_worker import PythonWorker
     from core.storage.storage_config import StorageConfig