diff --git a/ibis/backends/bigquery/client.py b/ibis/backends/bigquery/client.py
index a371cc4c2421..fcd754bfc491 100644
--- a/ibis/backends/bigquery/client.py
+++ b/ibis/backends/bigquery/client.py
@@ -195,7 +195,7 @@ def parse_project_and_dataset(project: str, dataset: str = "") -> tuple[str, str
     'ibis-gbq'
     >>> dataset
     'my_dataset'
-    >>> data_project, billing_project, _ = parse_project_and_dataset("ibis-gbq")
+    >>> data_project, billing_project, _dataset = parse_project_and_dataset("ibis-gbq")
     >>> data_project
     'ibis-gbq'
     """
diff --git a/ibis/backends/duckdb/__init__.py b/ibis/backends/duckdb/__init__.py
index 41e673f56b1d..21885edbd982 100644
--- a/ibis/backends/duckdb/__init__.py
+++ b/ibis/backends/duckdb/__init__.py
@@ -747,10 +747,13 @@ def read_sqlite(self, path: str | Path, table_name: str | None = None) -> ir.Tab
         >>> import sqlite3
         >>> ibis.options.interactive = True
         >>> with sqlite3.connect("/tmp/sqlite.db") as con:
-        ...     _ = con.execute("DROP TABLE IF EXISTS t")
-        ...     _ = con.execute("CREATE TABLE t (a INT, b TEXT)")
-        ...     _ = con.execute("INSERT INTO t VALUES (1, 'a'), (2, 'b'), (3, 'c')")
+        ...     con.execute("DROP TABLE IF EXISTS t")  # doctest: +ELLIPSIS
+        ...     con.execute("CREATE TABLE t (a INT, b TEXT)")  # doctest: +ELLIPSIS
+        ...     con.execute(
+        ...         "INSERT INTO t VALUES (1, 'a'), (2, 'b'), (3, 'c')"
+        ...     )  # doctest: +ELLIPSIS
         ...
+        <...>
         >>> con = ibis.connect("duckdb://")
         >>> t = con.read_sqlite("/tmp/sqlite.db", table_name="t")
         >>> t
@@ -798,10 +801,13 @@ def attach_sqlite(
         >>> import ibis
         >>> import sqlite3
         >>> with sqlite3.connect("/tmp/attach_sqlite.db") as con:
-        ...     _ = con.execute("DROP TABLE IF EXISTS t")
-        ...     _ = con.execute("CREATE TABLE t (a INT, b TEXT)")
-        ...     _ = con.execute("INSERT INTO t VALUES (1, 'a'), (2, 'b'), (3, 'c')")
+        ...     con.execute("DROP TABLE IF EXISTS t")  # doctest: +ELLIPSIS
+        ...     con.execute("CREATE TABLE t (a INT, b TEXT)")  # doctest: +ELLIPSIS
+        ...     con.execute(
+        ...         "INSERT INTO t VALUES (1, 'a'), (2, 'b'), (3, 'c')"
+        ...     )  # doctest: +ELLIPSIS
         ...
+        <...>
         >>> con = ibis.connect("duckdb://")
         >>> con.list_tables()
         []
diff --git a/ibis/expr/api.py b/ibis/expr/api.py
index 30f2fa35b958..3c91d24bfdbd 100644
--- a/ibis/expr/api.py
+++ b/ibis/expr/api.py
@@ -1058,7 +1058,7 @@ def read_csv(
     ... ,f
     ... '''
     >>> with open("/tmp/lines.csv", mode="w") as f:
-    ...     _ = f.write(lines)
+    ...     nbytes = f.write(lines)  # nbytes is unused
     ...
     >>> t = ibis.read_csv("/tmp/lines.csv")
     >>> t
@@ -1114,7 +1114,7 @@ def read_json(
     ... {"a": null, "b": "f"}
     ... '''
     >>> with open("/tmp/lines.json", mode="w") as f:
-    ...     _ = f.write(lines)
+    ...     nbytes = f.write(lines)  # nbytes is unused
     ...
     >>> t = ibis.read_json("/tmp/lines.json")
     >>> t
diff --git a/ibis/expr/types/relations.py b/ibis/expr/types/relations.py
index a012b0df00ce..36451f25664d 100644
--- a/ibis/expr/types/relations.py
+++ b/ibis/expr/types/relations.py
@@ -2379,7 +2379,7 @@ def unpack(self, *columns: str) -> Table:
         ...     {"name": "c", "pos": {"lat": 10.3, "lon": 30.1}}
         ... '''
         >>> with open("/tmp/lines.json", "w") as f:
-        ...     _ = f.write(lines)
+        ...     nbytes = f.write(lines)  # nbytes is unused
         ...
         >>> t = ibis.read_json("/tmp/lines.json")
         >>> t
diff --git a/ibis/expr/types/temporal.py b/ibis/expr/types/temporal.py
index e93a3bb29cc2..27a460103ac6 100644
--- a/ibis/expr/types/temporal.py
+++ b/ibis/expr/types/temporal.py
@@ -291,7 +291,7 @@ def delta(
         ... 2016-02-01T00:55:11,2016-02-01T01:24:34
         ... 2016-02-01T00:11:13,2016-02-01T00:16:59'''
         >>> with open("/tmp/triptimes.csv", "w") as f:
-        ...     _ = f.write(data)
+        ...     nbytes = f.write(data)  # nbytes is unused
         ...
         >>> taxi = ibis.read_csv("/tmp/triptimes.csv")
         >>> ride_duration = (
@@ -591,7 +591,7 @@ def delta(
         ... 2016-02-01T00:55:11,2016-02-01T01:24:34
         ... 2016-02-01T00:11:13,2016-02-01T00:16:59'''
         >>> with open("/tmp/triptimes.csv", "w") as f:
-        ...     _ = f.write(data)
+        ...     nbytes = f.write(data)  # nbytes is unused
         ...
         >>> taxi = ibis.read_csv("/tmp/triptimes.csv")
         >>> ride_duration = taxi.tpep_dropoff_datetime.delta(