diff --git a/src/hai_agents_local/workstation.py b/src/hai_agents_local/workstation.py
index 1d03225..6b78a1d 100644
--- a/src/hai_agents_local/workstation.py
+++ b/src/hai_agents_local/workstation.py
@@ -9,6 +9,7 @@
 import subprocess
 import sys
 import sysconfig
+from collections.abc import Mapping
 from pathlib import Path
 from typing import TYPE_CHECKING
 
@@ -36,9 +37,11 @@ def __init__(
         api_key: TokenSource,
         base_url: str | None = None,
         session_id: str | None = None,
+        environment_variables: Mapping[str, str] | None = None,
     ) -> None:
         super().__init__(environment_id, api_key=api_key, base_url=base_url, session_id=session_id)
         self.workspace = Path(workspace).expanduser() if workspace else Path.home() / "hai" / self.session_id
+        self.environment_variables = dict(environment_variables or {})
 
     def preflight(self) -> None:
         if sys.platform == "darwin":
@@ -58,6 +61,7 @@ def create_driver(self) -> ManagedCodeSandboxInterface:
         return LocalCodeSandbox(
             str(self.workspace),
             environment_variables={
+                **self.environment_variables,
                 "COORDINATE_SYSTEM": "0-1000",
                 "CUA_CURSOR": os.environ.get("CUA_CURSOR", "off"),
                 "CUA_SESSION": self.session_id,
diff --git a/tests/test_local.py b/tests/test_local.py
index 8bc829d..06a293b 100644
--- a/tests/test_local.py
+++ b/tests/test_local.py
@@ -731,17 +731,23 @@ def test_workstation_serves_a_shell_in_its_session_folder_with_the_cli_commands(
         pytest.importorskip("hai_drivers.code_sandbox.local.driver")
         monkeypatch.setenv("HOME", str(tmp_path))
         monkeypatch.delenv("CUA_CURSOR", raising=False)
-        bridge = WorkstationBridge(api_key="k")
+        bridge = WorkstationBridge(
+            api_key="k",
+            environment_variables={"RUN_CONFIG": "/run/config.json", "CUA_SESSION": "other", "PATH": "/nowhere"},
+        )
         bridge._driver = bridge.create_driver()
         try:
             result, error = bridge._dispatch(
                 "execute",
-                {"command": "pwd -P; echo $COORDINATE_SYSTEM $CUA_SESSION $CUA_CURSOR; command -v desk web cua click"},
+                {
+                    "command": "pwd -P; echo $COORDINATE_SYSTEM $CUA_SESSION $CUA_CURSOR $RUN_CONFIG;"
+                    " command -v desk web cua click"
+                },
             )
             assert error is None and result["exit_code"] == 0
             out = result["stdout"].split()
             assert out[0] == str((tmp_path / "hai" / bridge.session_id).resolve())
-            assert out[1:4] == ["0-1000", bridge.session_id, "off"] and len(out) == 8
+            assert out[1:5] == ["0-1000", bridge.session_id, "off", "/run/config.json"] and len(out) == 9
         finally:
             bridge._driver.close()