diff --git a/dask/base.py b/dask/base.py
index f2b8014cc71..fb22932383c 100644
--- a/dask/base.py
+++ b/dask/base.py
@@ -223,7 +223,11 @@ def is_dask_collection(x) -> bool:
             else:
                 raise TypeError("Unfamiliar with xarray type", type(x))
         else:
-            return hasattr(x, "__dask_graph__")
+            return (
+                hasattr(x, "__dask_graph__")
+                and callable(x.__dask_graph__)
+                and not isinstance(x, type)
+            )
 
     except (AttributeError, TypeError):
         return False
diff --git a/dask/tests/test_base.py b/dask/tests/test_base.py
index d0fc9489c95..b19d4a7130e 100644
--- a/dask/tests/test_base.py
+++ b/dask/tests/test_base.py
@@ -677,7 +677,6 @@ def __dask_graph__(self):
 
     x = delayed(1) + 2
     assert is_dask_collection(x)
-    assert not is_dask_collection(2)
     assert is_dask_collection(DummyCollection({}))
     assert not is_dask_collection(DummyCollection)