diff --git a/ibis/backends/tests/test_aggregation.py b/ibis/backends/tests/test_aggregation.py
index f5a1407cacd4f..d500fcaa41154 100644
--- a/ibis/backends/tests/test_aggregation.py
+++ b/ibis/backends/tests/test_aggregation.py
@@ -1357,8 +1357,7 @@ def test_group_concat_ordered(alltypes, df, filtered):
     raises=com.OperationNotDefinedError,
 )
 @pytest.mark.notimpl(
-    ["clickhouse", "dask", "pandas", "pyspark", "flink"],
-    raises=com.UnsupportedOperationError,
+    ["clickhouse", "pandas", "pyspark", "flink"], raises=com.UnsupportedOperationError
 )
 @pytest.mark.parametrize(
     "filtered",
@@ -1395,9 +1394,6 @@ def test_collect_ordered(alltypes, df, filtered):
     ["druid", "exasol", "impala", "mssql", "mysql", "oracle", "sqlite"],
     raises=com.OperationNotDefinedError,
 )
-@pytest.mark.notimpl(
-    ["dask"], raises=AttributeError, reason="Dask doesn't implement tolist()"
-)
 @pytest.mark.parametrize(
     "filtered",
     [
diff --git a/ibis/backends/tests/test_dot_sql.py b/ibis/backends/tests/test_dot_sql.py
index 402c685aca044..a2bc8a2a72f2f 100644
--- a/ibis/backends/tests/test_dot_sql.py
+++ b/ibis/backends/tests/test_dot_sql.py
@@ -19,9 +19,7 @@
 pd = pytest.importorskip("pandas")
 tm = pytest.importorskip("pandas.testing")
 
-dot_sql_never = pytest.mark.never(
-    ["dask", "pandas"], reason="dask and pandas do not accept SQL"
-)
+dot_sql_never = pytest.mark.never(["pandas"], reason="pandas does not accept SQL")
 
 _NAMES = {
     "bigquery": f"ibis_gbq_testing_{getpass.getuser()}_{PYTHON_SHORT_VERSION}.functional_alltypes",
diff --git a/ibis/backends/tests/test_generic.py b/ibis/backends/tests/test_generic.py
index 6237871a92070..fe2da702e5793 100644
--- a/ibis/backends/tests/test_generic.py
+++ b/ibis/backends/tests/test_generic.py
@@ -354,7 +354,7 @@ def test_filter(backend, alltypes, sorted_df, predicate_fn, expected_fn):
     raises=PyDruidProgrammingError,
     reason="requires enabling window functions",
 )
-@pytest.mark.notimpl(["polars", "dask", "pandas"], raises=com.OperationNotDefinedError)
+@pytest.mark.notimpl(["polars", "pandas"], raises=com.OperationNotDefinedError)
 @pytest.mark.notyet(
     ["oracle"],
     raises=OracleDatabaseError,
diff --git a/ibis/backends/tests/test_sql.py b/ibis/backends/tests/test_sql.py
index ec69b29ba4804..efdd41c8459cf 100644
--- a/ibis/backends/tests/test_sql.py
+++ b/ibis/backends/tests/test_sql.py
@@ -209,7 +209,7 @@ def query(t, group_cols):
 
 @pytest.mark.parametrize("backend_name", _get_backends_to_test())
 @pytest.mark.notimpl(
-    ["dask", "pandas", "polars"], raises=ValueError, reason="not a SQL backend"
+    ["pandas", "polars"], raises=ValueError, reason="not a SQL backend"
 )
 def test_mixed_qualified_and_unqualified_predicates(backend_name, snapshot):
     t = ibis.table({"x": "int64"}, name="t")
@@ -229,7 +229,7 @@ def test_mixed_qualified_and_unqualified_predicates(backend_name, snapshot):
 
 @pytest.mark.parametrize("backend_name", _get_backends_to_test())
 @pytest.mark.notimpl(
-    ["dask", "pandas", "polars"], raises=ValueError, reason="not a SQL backend"
+    ["pandas", "polars"], raises=ValueError, reason="not a SQL backend"
 )
 def test_rewrite_context(snapshot, backend_name):
     table = ibis.memtable({"test": [1, 2, 3, 4, 5]}, name="test")