diff --git a/src/sentry/notifications/helpers.py b/src/sentry/notifications/helpers.py
index aa6efd356cafdd..542941581b9ac8 100644
--- a/src/sentry/notifications/helpers.py
+++ b/src/sentry/notifications/helpers.py
@@ -57,27 +57,31 @@ def _get_setting_mapping_from_mapping(
     type: NotificationSettingTypes,
     should_use_slack_automatic: bool = False,
 ) -> Mapping[ExternalProviders, NotificationSettingOptionValues]:
-    # XXX(CEO): may not respect granularity of a setting for Slack a setting for email
-    # but we'll worry about that later since we don't have a FE for it yet
+    """
+    XXX(CEO): may not respect granularity of a setting for Slack a setting for
+     email but we'll worry about that later since we don't have a FE for it yet.
+    """
     from sentry.notifications.notify import notification_providers
 
-    specific_scope = get_scope_type(type)
+    # Fill in with the fallback values.
+    notification_setting_option = {
+        provider: _get_notification_setting_default(
+            provider, type, should_use_slack_automatic=should_use_slack_automatic
+        )
+        for provider in notification_providers()
+    }
+
     notification_settings_mapping = notification_settings_by_recipient.get(recipient)
     if notification_settings_mapping:
-        notification_setting_option = (
+        specific_scope = get_scope_type(type)
+        notification_setting_option.update(
             notification_settings_mapping.get(specific_scope)
             or notification_settings_mapping.get(NotificationScopeType.USER)
             or notification_settings_mapping.get(NotificationScopeType.TEAM)
+            or {}
         )
-        if notification_setting_option:
-            return notification_setting_option
 
-    return {
-        provider: _get_notification_setting_default(
-            provider, type, should_use_slack_automatic=should_use_slack_automatic
-        )
-        for provider in notification_providers()
-    }
+    return notification_setting_option
 
 
 def where_should_recipient_be_notified(
diff --git a/src/sentry/testutils/helpers/slack.py b/src/sentry/testutils/helpers/slack.py
index d40911c5171040..2ca893435e563c 100644
--- a/src/sentry/testutils/helpers/slack.py
+++ b/src/sentry/testutils/helpers/slack.py
@@ -92,8 +92,9 @@ def link_team(team: Team, integration: Integration, channel_name: str, channel_i
 
 
 def send_notification(*args):
-    args_list = list(args)[1:]
-    send_notification_as_slack(*args_list, {})
+    provider, *args_list = args
+    if provider == ExternalProviders.SLACK:
+        send_notification_as_slack(*args_list, {})
 
 
 def get_attachment():
diff --git a/tests/sentry/notifications/notifications/test_organization_request.py b/tests/sentry/notifications/notifications/test_organization_request.py
index 582e2381e9591c..e57e34dbb9e337 100644
--- a/tests/sentry/notifications/notifications/test_organization_request.py
+++ b/tests/sentry/notifications/notifications/test_organization_request.py
@@ -34,7 +34,6 @@ def test_default_to_slack(self):
 
     @with_feature("organizations:slack-requests")
     def test_turn_off_settings(self):
-
         NotificationSetting.objects.update_settings(
             ExternalProviders.SLACK,
             NotificationSettingTypes.APPROVAL,
@@ -53,6 +52,6 @@ def test_turn_off_settings(self):
         notification = DummyRequestNotification(self.organization, self.user, member_ids)
 
         assert notification.get_participants() == {
-            ExternalProviders.EMAIL: {self.user2},
-            ExternalProviders.SLACK: {self.user1},
+            ExternalProviders.EMAIL: {self.user1, self.user2},
+            ExternalProviders.SLACK: {self.user1, self.user2},
         }
diff --git a/tests/sentry/notifications/test_utils.py b/tests/sentry/notifications/test_utils.py
index ebf31b35eefcbe..a79080ce647509 100644
--- a/tests/sentry/notifications/test_utils.py
+++ b/tests/sentry/notifications/test_utils.py
@@ -1,6 +1,5 @@
 from sentry.models import NotificationSetting
 from sentry.notifications.helpers import (
-    _get_setting_mapping_from_mapping,
     collect_groups_by_project,
     get_scope_type,
     get_settings_by_provider,
@@ -42,51 +41,6 @@ def setUp(self):
             user=self.user,
         )
 
-    def test_get_setting_mapping_from_mapping_issue_alerts(self):
-        notification_settings = {
-            self.user: {
-                NotificationScopeType.USER: {
-                    ExternalProviders.EMAIL: NotificationSettingOptionValues.ALWAYS
-                }
-            }
-        }
-        mapping = _get_setting_mapping_from_mapping(
-            notification_settings,
-            self.user,
-            NotificationSettingTypes.ISSUE_ALERTS,
-        )
-        assert mapping == {ExternalProviders.EMAIL: NotificationSettingOptionValues.ALWAYS}
-
-    def test_get_setting_mapping_from_mapping_deploy(self):
-        notification_settings = {
-            self.user: {
-                NotificationScopeType.USER: {
-                    ExternalProviders.EMAIL: NotificationSettingOptionValues.COMMITTED_ONLY
-                }
-            }
-        }
-        mapping = _get_setting_mapping_from_mapping(
-            notification_settings,
-            self.user,
-            NotificationSettingTypes.DEPLOY,
-        )
-        assert mapping == {ExternalProviders.EMAIL: NotificationSettingOptionValues.COMMITTED_ONLY}
-
-    def test_get_setting_mapping_from_mapping_workflow(self):
-        notification_settings = {
-            self.user: {
-                NotificationScopeType.USER: {
-                    ExternalProviders.EMAIL: NotificationSettingOptionValues.SUBSCRIBE_ONLY
-                }
-            }
-        }
-        mapping = _get_setting_mapping_from_mapping(
-            notification_settings,
-            self.user,
-            NotificationSettingTypes.WORKFLOW,
-        )
-        assert mapping == {ExternalProviders.EMAIL: NotificationSettingOptionValues.SUBSCRIBE_ONLY}
-
     def test_get_deploy_values_by_provider_empty_settings(self):
         values_by_provider = get_values_by_provider_by_type(
             {},
diff --git a/tests/sentry/notifications/utils/test_get_setting_mapping_from_mapping.py b/tests/sentry/notifications/utils/test_get_setting_mapping_from_mapping.py
new file mode 100644
index 00000000000000..4ccb45e3098d2b
--- /dev/null
+++ b/tests/sentry/notifications/utils/test_get_setting_mapping_from_mapping.py
@@ -0,0 +1,116 @@
+from unittest import TestCase
+
+from sentry.models import User
+from sentry.notifications.helpers import _get_setting_mapping_from_mapping
+from sentry.notifications.types import (
+    NotificationScopeType,
+    NotificationSettingOptionValues,
+    NotificationSettingTypes,
+)
+from sentry.types.integrations import ExternalProviders
+
+
+class GetSettingMappingFromMappingTest(TestCase):
+    def setUp(self):
+        self.user = User(id=1)
+
+    def test_get_setting_mapping_from_mapping_issue_alerts(self):
+        notification_settings = {
+            self.user: {
+                NotificationScopeType.USER: {
+                    ExternalProviders.EMAIL: NotificationSettingOptionValues.ALWAYS
+                }
+            }
+        }
+        mapping = _get_setting_mapping_from_mapping(
+            notification_settings,
+            self.user,
+            NotificationSettingTypes.ISSUE_ALERTS,
+        )
+        assert mapping == {
+            ExternalProviders.EMAIL: NotificationSettingOptionValues.ALWAYS,
+            ExternalProviders.SLACK: NotificationSettingOptionValues.NEVER,
+        }
+
+    def test_get_setting_mapping_from_mapping_deploy(self):
+        notification_settings = {
+            self.user: {
+                NotificationScopeType.USER: {
+                    ExternalProviders.EMAIL: NotificationSettingOptionValues.COMMITTED_ONLY
+                }
+            }
+        }
+        mapping = _get_setting_mapping_from_mapping(
+            notification_settings,
+            self.user,
+            NotificationSettingTypes.DEPLOY,
+        )
+        assert mapping == {
+            ExternalProviders.EMAIL: NotificationSettingOptionValues.COMMITTED_ONLY,
+            ExternalProviders.SLACK: NotificationSettingOptionValues.NEVER,
+        }
+
+    def test_get_setting_mapping_from_mapping_workflow(self):
+        notification_settings = {
+            self.user: {
+                NotificationScopeType.USER: {
+                    ExternalProviders.EMAIL: NotificationSettingOptionValues.SUBSCRIBE_ONLY
+                }
+            }
+        }
+        mapping = _get_setting_mapping_from_mapping(
+            notification_settings,
+            self.user,
+            NotificationSettingTypes.WORKFLOW,
+        )
+        assert mapping == {
+            ExternalProviders.EMAIL: NotificationSettingOptionValues.SUBSCRIBE_ONLY,
+            ExternalProviders.SLACK: NotificationSettingOptionValues.NEVER,
+        }
+
+    def test_get_setting_mapping_from_mapping_empty(self):
+        mapping = _get_setting_mapping_from_mapping(
+            {}, self.user, NotificationSettingTypes.ISSUE_ALERTS
+        )
+        assert mapping == {
+            ExternalProviders.EMAIL: NotificationSettingOptionValues.ALWAYS,
+            ExternalProviders.SLACK: NotificationSettingOptionValues.NEVER,
+        }
+
+    def test_get_setting_mapping_from_mapping_slack_never(self):
+        notification_settings = {
+            self.user: {
+                NotificationScopeType.USER: {
+                    ExternalProviders.SLACK: NotificationSettingOptionValues.NEVER
+                }
+            }
+        }
+
+        mapping = _get_setting_mapping_from_mapping(
+            notification_settings,
+            self.user,
+            NotificationSettingTypes.ISSUE_ALERTS,
+        )
+        assert mapping == {
+            ExternalProviders.EMAIL: NotificationSettingOptionValues.ALWAYS,
+            ExternalProviders.SLACK: NotificationSettingOptionValues.NEVER,
+        }
+
+    def test_get_setting_mapping_from_mapping_slack_always(self):
+        notification_settings = {
+            self.user: {
+                NotificationScopeType.USER: {
+                    ExternalProviders.SLACK: NotificationSettingOptionValues.ALWAYS
+                }
+            }
+        }
+
+        mapping = _get_setting_mapping_from_mapping(
+            notification_settings,
+            self.user,
+            NotificationSettingTypes.ISSUE_ALERTS,
+        )
+        assert mapping == {
+            ExternalProviders.EMAIL: NotificationSettingOptionValues.ALWAYS,
+            ExternalProviders.SLACK: NotificationSettingOptionValues.ALWAYS,
+        }