diff --git a/docs/gallery_code/oceanography/plot_load_nemo.py b/docs/gallery_code/oceanography/plot_load_nemo.py
index c7ad5aaee4..4bfee5ac8e 100644
--- a/docs/gallery_code/oceanography/plot_load_nemo.py
+++ b/docs/gallery_code/oceanography/plot_load_nemo.py
@@ -8,8 +8,6 @@
 them without the intervention shown here.
 """
 
-from __future__ import unicode_literals
-
 import matplotlib.pyplot as plt
 
 import iris
diff --git a/lib/iris/tests/unit/constraints/__init__.py b/lib/iris/tests/unit/constraints/__init__.py
index f988e74937..03a987b1a1 100644
--- a/lib/iris/tests/unit/constraints/__init__.py
+++ b/lib/iris/tests/unit/constraints/__init__.py
@@ -4,6 +4,3 @@
 # See COPYING and COPYING.LESSER in the root of the repository for full
 # licensing details.
 """Unit tests for the :mod:`iris._constraints` module."""
-
-from __future__ import absolute_import, division, print_function
-from six.moves import filter, input, map, range, zip  # noqa
diff --git a/lib/iris/tests/unit/constraints/test_NameConstraint.py b/lib/iris/tests/unit/constraints/test_NameConstraint.py
index 553f4ca7a6..edf99a438f 100644
--- a/lib/iris/tests/unit/constraints/test_NameConstraint.py
+++ b/lib/iris/tests/unit/constraints/test_NameConstraint.py
@@ -5,9 +5,6 @@
 # licensing details.
 """Unit tests for the `iris._constraints.NameConstraint` class."""
 
-from __future__ import absolute_import, division, print_function
-from six.moves import filter, input, map, range, zip  # noqa
-
 # Import iris.tests first so that some things can be initialised before
 # importing anything else.
 import iris.tests as tests