diff --git a/.github/workflows/run-tests-on-push.yml b/.github/workflows/run-tests-on-push.yml
index 965ddfb34..5cc510112 100644
--- a/.github/workflows/run-tests-on-push.yml
+++ b/.github/workflows/run-tests-on-push.yml
@@ -7,8 +7,8 @@ env:
 
 jobs:
   run-tests-3_9:
-    runs-on: ubuntu-20.04
-    name: Pytest on Python 3.9 / Ubuntu 20.04
+    runs-on: ubuntu-24.04
+    name: Pytest on Python 3.9 / Ubuntu 24.04
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
diff --git a/src/mavedb/routers/mapped_variant.py b/src/mavedb/routers/mapped_variant.py
index 05b9f6add..1fab6d1be 100644
--- a/src/mavedb/routers/mapped_variant.py
+++ b/src/mavedb/routers/mapped_variant.py
@@ -26,7 +26,7 @@ async def fetch_mapped_variant_by_variant_urn(db, urn: str) -> Optional[MappedVa
             db.query(MappedVariant)
             .filter(Variant.urn == urn)
             .filter(MappedVariant.variant_id == Variant.id)
-            .filter(MappedVariant.current is True)
+            .filter(MappedVariant.current)  # filter current is true
             .one_or_none()
         )
     except MultipleResultsFound: