diff --git a/src/sentry/integrations/bitbucket/search.py b/src/sentry/integrations/bitbucket/search.py
index f164b81d5cc38d..4d09915de1c6d2 100644
--- a/src/sentry/integrations/bitbucket/search.py
+++ b/src/sentry/integrations/bitbucket/search.py
@@ -38,9 +38,8 @@ def get(self, request: Request, organization, integration_id, **kwds) -> Respons
         if not query:
             return Response({"detail": "query is a required parameter"}, status=400)
 
-        installation: BitbucketIntegration = integration.get_installation(
-            organization_id=organization.id
-        )
+        installation = integration.get_installation(organization_id=organization.id)
+        assert isinstance(installation, BitbucketIntegration), installation
 
         if field == "externalIssue":
             repo = request.GET.get("repo")
diff --git a/src/sentry/integrations/github/installation.py b/src/sentry/integrations/github/installation.py
index 876f86b862dc5d..206576b6df3792 100644
--- a/src/sentry/integrations/github/installation.py
+++ b/src/sentry/integrations/github/installation.py
@@ -44,6 +44,7 @@ def get(self, request: Request, installation_id):
         if "sender" not in integration.metadata:
             return HttpResponse(status=404)
 
+        assert integration.date_added is not None
         time_elapsed_since_added = time.time() - integration.date_added.timestamp()
         if time_elapsed_since_added > INSTALLATION_EXPOSURE_MAX_TIME:
             return HttpResponse(status=404)
diff --git a/src/sentry/integrations/github/search.py b/src/sentry/integrations/github/search.py
index c36ed8c14378d0..1b7be34c88634b 100644
--- a/src/sentry/integrations/github/search.py
+++ b/src/sentry/integrations/github/search.py
@@ -7,7 +7,8 @@
 from sentry.api.api_publish_status import ApiPublishStatus
 from sentry.api.base import control_silo_endpoint
 from sentry.api.bases.integration import IntegrationEndpoint
-from sentry.integrations.github.integration import build_repository_query
+from sentry.integrations.github.integration import GitHubIntegration, build_repository_query
+from sentry.integrations.github_enterprise.integration import GitHubEnterpriseIntegration
 from sentry.models.integrations.integration import Integration
 from sentry.services.hybrid_cloud.organization import RpcOrganization
 from sentry.shared_integrations.exceptions import ApiError
@@ -40,13 +41,16 @@ def get(
             return Response({"detail": "query is a required parameter"}, status=400)
 
         installation = integration.get_installation(organization.id)
+        assert isinstance(
+            installation, (GitHubIntegration, GitHubEnterpriseIntegration)
+        ), installation
         if field == "externalIssue":
             repo = request.GET.get("repo")
             if repo is None:
                 return Response({"detail": "repo is a required parameter"}, status=400)
 
             try:
-                response = installation.search_issues(query=(f"repo:{repo} {query}").encode())
+                response = installation.search_issues(query=f"repo:{repo} {query}")
             except ApiError as err:
                 if err.code == 403:
                     return Response({"detail": "Rate limit exceeded"}, status=429)
diff --git a/src/sentry/integrations/gitlab/search.py b/src/sentry/integrations/gitlab/search.py
index d965a3e58200fc..a5e14e088d6491 100644
--- a/src/sentry/integrations/gitlab/search.py
+++ b/src/sentry/integrations/gitlab/search.py
@@ -7,6 +7,7 @@
 from sentry.api.api_publish_status import ApiPublishStatus
 from sentry.api.base import control_silo_endpoint
 from sentry.api.bases.integration import IntegrationEndpoint
+from sentry.integrations.gitlab.integration import GitlabIntegration
 from sentry.models.integrations.integration import Integration
 from sentry.services.hybrid_cloud.organization import RpcOrganization
 from sentry.shared_integrations.exceptions import ApiError
@@ -39,6 +40,7 @@ def get(
             return Response({"detail": "query is a required parameter"}, status=400)
 
         installation = integration.get_installation(organization.id)
+        assert isinstance(installation, GitlabIntegration), installation
 
         if field == "externalIssue":
             project = request.GET.get("project")
diff --git a/src/sentry/integrations/jira/views/sentry_issue_details.py b/src/sentry/integrations/jira/views/sentry_issue_details.py
index 99376c9e69e999..00f714d39d0af6 100644
--- a/src/sentry/integrations/jira/views/sentry_issue_details.py
+++ b/src/sentry/integrations/jira/views/sentry_issue_details.py
@@ -142,9 +142,7 @@ def get(self, request: Request, issue_key, *args, **kwargs) -> Response:
                 external_issue = ExternalIssue.objects.get(
                     integration_id=integration.id, key=issue_key
                 )
-                organization = Organization.objects.filter(
-                    id=external_issue.organization_id
-                ).first()
+                organization = Organization.objects.get(id=external_issue.organization_id)
                 if (
                     integration_service.get_organization_integration(
                         organization_id=external_issue.organization_id,
diff --git a/src/sentry/integrations/slack/sdk_client.py b/src/sentry/integrations/slack/sdk_client.py
index 981bec03f89e2b..07950f92f86601 100644
--- a/src/sentry/integrations/slack/sdk_client.py
+++ b/src/sentry/integrations/slack/sdk_client.py
@@ -10,6 +10,7 @@
 from sentry.integrations.request_buffer import IntegrationRequestBuffer
 from sentry.models.integrations import Integration
 from sentry.services.hybrid_cloud.integration import integration_service
+from sentry.services.hybrid_cloud.integration.model import RpcIntegration
 from sentry.silo.base import SiloMode
 from sentry.utils import metrics
 
@@ -104,7 +105,7 @@ class SlackSdkClient(WebClient, metaclass=MetaClass):
     def __init__(self, integration_id: int):
         self.integration_id = integration_id
 
-        integration = None
+        integration: Integration | RpcIntegration | None
         if SiloMode.get_current_mode() == SiloMode.REGION:
             integration = integration_service.get_integration(integration_id=integration_id)
         else:  # control or monolith (local)