diff --git a/deepnote_toolkit/set_integrations_env.py b/deepnote_toolkit/set_integrations_env.py
index 0edaadd..56c4d2e 100644
--- a/deepnote_toolkit/set_integrations_env.py
+++ b/deepnote_toolkit/set_integrations_env.py
@@ -2,7 +2,7 @@
 from requests.adapters import HTTPAdapter, Retry
 
 from . import env as dnenv
-from .config import get_config
+from .config import clear_config_cache, get_config
 from .get_webapp_url import get_absolute_userpod_api_url, get_project_auth_headers
 from .logging import LoggerManager
 
@@ -64,4 +64,8 @@ def set_integration_env():
         v["name"] for v in variables if v.get("name") is not None
     ]
 
+    # New env vars may affect config, so drop the cached config to
+    # force a fresh read on next access.
+    clear_config_cache()
+
     logger.info("Finish set_integration_env")
diff --git a/tests/unit/test_config.py b/tests/unit/test_config.py
index bd96b53..b070e2d 100644
--- a/tests/unit/test_config.py
+++ b/tests/unit/test_config.py
@@ -3,6 +3,7 @@
 
 from deepnote_core.config.loader import ConfigurationLoader
 from deepnote_core.config.models import DeepnoteConfig
+from deepnote_toolkit.config import clear_config_cache, get_config
 
 
 def test_port_validation_range():
@@ -26,6 +27,24 @@ def test_runtime_coerce_float_inverted_flag(monkeypatch):
     assert cfg.runtime.coerce_float is False
 
 
+def test_coerce_float_picks_up_late_env_after_cache_clear(monkeypatch):
+    # Setup: start from a clean cache and confirm the default value
+    clear_config_cache()
+    monkeypatch.delenv("DEEPNOTE_DO_NOT_COERCE_FLOAT", raising=False)
+    cfg_default = get_config()
+    assert cfg_default.runtime.coerce_float is True
+
+    # Inject the env var; the cached config should still return the default
+    monkeypatch.setenv("DEEPNOTE_DO_NOT_COERCE_FLOAT", "1")
+    cfg_cached = get_config()
+    assert cfg_cached.runtime.coerce_float is True
+
+    # After clearing the cache, the config should pick up the injected value
+    clear_config_cache()
+    cfg_refreshed = get_config()
+    assert cfg_refreshed.runtime.coerce_float is False
+
+
 def test_loader_precedence_cli_over_env_over_file(tmp_path, monkeypatch):
     # File value: 7777
     config_file = tmp_path / "deepnote-toolkit.toml"
diff --git a/tests/unit/test_set_integrations_env.py b/tests/unit/test_set_integrations_env.py
index db1b17f..1c26644 100644
--- a/tests/unit/test_set_integrations_env.py
+++ b/tests/unit/test_set_integrations_env.py
@@ -74,6 +74,38 @@ def get(self, *a, **k):
         set_integration_env()
 
 
+@mock.patch(
+    "deepnote_toolkit.set_integrations_env.get_config",
+    side_effect=lambda: _mock_cfg(True),
+)
+def test_set_integration_env_clears_config_cache(
+    mock_get_config, monkeypatch  # noqa: ARG001
+):
+    class DummyResp:
+        ok = True
+
+        def json(self):
+            return [{"name": "DEEPNOTE_DO_NOT_COERCE_FLOAT", "value": "1"}]
+
+    class DummySession:
+        def mount(self, *a, **k):
+            pass
+
+        def get(self, *a, **k):
+            return DummyResp()
+
+    monkeypatch.setattr(
+        "deepnote_toolkit.set_integrations_env.requests.Session", lambda: DummySession()
+    )
+    monkeypatch.setenv("DEEPNOTE_PROJECT_ID", "pid")
+
+    with mock.patch(
+        "deepnote_toolkit.set_integrations_env.clear_config_cache"
+    ) as mock_clear:
+        set_integration_env()
+        mock_clear.assert_called_once()
+
+
 def test_set_integration_env_disabled_gate(monkeypatch):
     # get_config returns disabled gate; Session should not be constructed
     from deepnote_toolkit import set_integrations_env as sie