diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index ea7a6abfb..d62caf8c2 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -29,6 +29,7 @@ env:
   WEAVIATE_135: 1.35.18
   WEAVIATE_136: 1.36.12
   WEAVIATE_137: 1.37.5-e0fe0d5.amd64
+  WEAVIATE_139: 1.39.0-rc.0-b41225e.amd64
 
 jobs:
   lint-and-format:
@@ -162,11 +163,11 @@ jobs:
       fail-fast: false
       matrix:
         versions: [
-          { py: "3.10", weaviate: $WEAVIATE_136, grpc: "1.59.0"},
-          { py: "3.11", weaviate: $WEAVIATE_136, grpc: "1.66.0"},
-          { py: "3.12", weaviate: $WEAVIATE_136, grpc: "1.70.0"},
-          { py: "3.13", weaviate: $WEAVIATE_136, grpc: "1.72.1"},
-          { py: "3.14", weaviate: $WEAVIATE_136, grpc: "1.76.0"}
+          { py: "3.10", weaviate: $WEAVIATE_139, grpc: "1.59.0"},
+          { py: "3.11", weaviate: $WEAVIATE_139, grpc: "1.66.0"},
+          { py: "3.12", weaviate: $WEAVIATE_139, grpc: "1.70.0"},
+          { py: "3.13", weaviate: $WEAVIATE_139, grpc: "1.72.1"},
+          { py: "3.14", weaviate: $WEAVIATE_139, grpc: "1.76.0"}
         ]
         optional_dependencies: [false]
     steps:
@@ -320,7 +321,8 @@ jobs:
           $WEAVIATE_134,
           $WEAVIATE_135,
           $WEAVIATE_136,
-          $WEAVIATE_137
+          $WEAVIATE_137,
+          $WEAVIATE_139
         ]
     steps:
       - name: Checkout
diff --git a/integration/test_collection_config.py b/integration/test_collection_config.py
index 814c5d41a..786b486cd 100644
--- a/integration/test_collection_config.py
+++ b/integration/test_collection_config.py
@@ -48,6 +48,19 @@
     WeaviateUnsupportedFeatureError,
 )
 from integration.conftest import retry_on_http_error
+from weaviate.util import _ServerVersion
+
+
+def _expected_async_enabled(version: _ServerVersion, factor: int) -> bool:
+    """Whether the server reports async replication as enabled for a collection.
+
+    Up to 1.38 the server stores whatever `async_enabled` the collection was created with. From
+    1.39 it ignores that and derives the field as `factor > 1 and not globally disabled` instead,
+    so a collection with a single replica always reports `False`.
+    """
+    if version.is_at_least(1, 39, 0):
+        return factor > 1
+    return version.is_at_least(1, 26, 0)
 
 
 @pytest.fixture(scope="module")
@@ -353,10 +366,9 @@ def test_collection_config_full(collection_factory: CollectionFactory) -> None:
         assert config.multi_tenancy_config.auto_tenant_creation is False
 
     assert config.replication_config.factor == 1
-    if collection._connection._weaviate_version.is_at_least(1, 26, 0):
-        assert config.replication_config.async_enabled is True
-    else:
-        assert config.replication_config.async_enabled is False
+    assert config.replication_config.async_enabled is _expected_async_enabled(
+        collection._connection._weaviate_version, factor=1
+    )
 
     if collection._connection._weaviate_version.is_at_least(1, 24, 25):
         assert (
@@ -1605,7 +1617,9 @@ def test_replication_config_with_async_config(collection_factory: CollectionFact
     )
     config = collection.config.get()
     assert config.replication_config.factor == 1
-    assert config.replication_config.async_enabled is True
+    assert config.replication_config.async_enabled is _expected_async_enabled(
+        collection._connection._weaviate_version, factor=1
+    )
     assert config.replication_config.async_config is not None
     ac = config.replication_config.async_config
     assert ac.propagation_concurrency == 4
@@ -1672,7 +1686,9 @@ def test_replication_config_remove_async_config(collection_factory: CollectionFa
         ),
     )
     config = collection.config.get()
-    assert config.replication_config.async_enabled is True
+    assert config.replication_config.async_enabled is _expected_async_enabled(
+        collection._connection._weaviate_version, factor=1
+    )
     assert config.replication_config.async_config is None
     assert config.replication_config.factor == 1