diff --git a/app/modules/incident/incident.py b/app/modules/incident/incident.py
index bd1357d4..f096eaa1 100644
--- a/app/modules/incident/incident.py
+++ b/app/modules/incident/incident.py
@@ -342,7 +342,9 @@ def submit(ack, view, say, body, client, logger):
 
     # Get users from the @security group
     response = client.usergroups_users_list(usergroup=SLACK_SECURITY_USER_GROUP_ID)
-    if response.get("ok"):
+
+    # if we are testing, ie PREFIX is "dev" then don't add the security group users since we don't want to spam them
+    if response.get("ok") and PREFIX == "":
         for security_user in response["users"]:
             if security_user != user_id:
                 users_to_invite.append(security_user)
diff --git a/app/tests/modules/incident/test_incident.py b/app/tests/modules/incident/test_incident.py
index f0bdc3a8..164239ef 100644
--- a/app/tests/modules/incident/test_incident.py
+++ b/app/tests/modules/incident/test_incident.py
@@ -1,5 +1,7 @@
 import datetime
 
+import os
+
 from modules import incident
 
 from unittest.mock import call, MagicMock, patch, ANY
@@ -875,6 +877,61 @@ def test_incident_submit_does_not_invite_security_group_members_already_in_chann
     )
 
 
+@patch("modules.incident.incident.google_drive.update_incident_list")
+@patch("modules.incident.incident.google_drive.merge_data")
+@patch("modules.incident.incident.google_drive.create_new_incident")
+@patch("modules.incident.incident.google_drive.list_metadata")
+@patch("modules.incident.incident.opsgenie.get_on_call_users")
+@patch("modules.incident.incident.log_to_sentinel")
+@patch.dict(os.environ, {"PREFIX": "dev"})
+def test_incident_submit_does_not_invite_security_group_members_if_prefix_dev(
+    _log_to_sentinel_mock,
+    mock_get_on_call_users,
+    mock_list_metadata,
+    mock_create_new_incident,
+    mock_merge_data,
+    mock_update_incident_list,
+):
+    ack = MagicMock()
+    logger = MagicMock()
+    view = helper_generate_view()
+    say = MagicMock()
+    body = {"user": {"id": "creator_user_id"}, "trigger_id": "trigger_id", "view": view}
+    client = MagicMock()
+    client.conversations_create.return_value = {
+        "channel": {"id": "channel_id", "name": "channel_name"}
+    }
+    client.users_lookupByEmail.return_value = {
+        "ok": True,
+        "user": {
+            "id": "on_call_user_id",
+            "profile": {"display_name_normalized": "name"},
+        },
+    }
+    client.usergroups_users_list.return_value = {
+        "ok": True,
+        "users": [
+            "creator_user_id",
+        ],
+    }
+
+    mock_create_new_incident.return_value = "id"
+
+    mock_get_on_call_users.return_value = ["email"]
+    mock_list_metadata.return_value = {"appProperties": {"genie_schedule": "oncall"}}
+
+    incident.submit(ack, view, say, body, client, logger)
+    mock_get_on_call_users.assert_called_once_with("oncall")
+    client.users_lookupByEmail.assert_any_call(email="email")
+    client.usergroups_users_list(usergroup="SLACK_SECURITY_USER_GROUP_ID")
+    client.conversations_invite.assert_has_calls(
+        [
+            call(channel="channel_id", users="creator_user_id"),
+            call(channel="channel_id", users=["on_call_user_id"]),
+        ]
+    )
+
+
 @patch("integrations.google_workspace.google_docs.extract_google_doc_id")
 def test_handle_reaction_added_floppy_disk_reaction_in_incident_channel(
     mock_extract_google_doc_id,