diff --git a/langfuse/client.py b/langfuse/client.py
index 3c144d20..de05439e 100644
--- a/langfuse/client.py
+++ b/langfuse/client.py
@@ -297,10 +297,9 @@ def __init__(
         if self.environment and not bool(
             re.match(ENVIRONMENT_PATTERN, self.environment)
         ):
-            self.log.warning(
-                f'Invalid environment specified "{environment}" that does not match validation pattern ("{ENVIRONMENT_PATTERN}"). Setting will be ignored.'
+            self.log.error(
+                f'Invalid environment specified "{environment}" that does not match validation pattern ("{ENVIRONMENT_PATTERN}"). Events will be rejected by Langfuse servers.'
             )
-            self.environment = None
 
         self.httpx_client = httpx_client or httpx.Client(timeout=timeout)
 
diff --git a/tests/test_core_sdk.py b/tests/test_core_sdk.py
index f06970d4..2ae6325c 100644
--- a/tests/test_core_sdk.py
+++ b/tests/test_core_sdk.py
@@ -1578,16 +1578,3 @@ def test_environment_from_env_var(monkeypatch):
 
     fetched_trace = api_wrapper.get_trace(trace.id)
     assert fetched_trace["environment"] == "testing"
-
-
-def test_invalid_environment():
-    # Test with invalid environment (too long)
-    langfuse = Langfuse(debug=True, environment="UPPERCASE")
-    api_wrapper = LangfuseAPI()
-
-    trace = langfuse.trace(name="test_invalid_environment")
-    langfuse.flush()
-    sleep(1)
-
-    fetched_trace = api_wrapper.get_trace(trace.id)
-    assert fetched_trace["environment"] is None