3 files changed, 6 insertions, 0 deletions
diff --git a/tests/db_functions/math/test_atan2.py b/tests/db_functions/math/test_atan2.py
index ca12e64479..ce9dd53187 100644
--- a/tests/db_functions/math/test_atan2.py
+++ b/tests/db_functions/math/test_atan2.py
@@ -14,9 +14,11 @@ class ATan2Tests(TestCase):
         obj = IntegerModel.objects.annotate(
             null_atan2_sn=ATan2('small', 'normal'),
             null_atan2_nb=ATan2('normal', 'big'),
+            null_atan2_bn=ATan2('big', 'normal'),
         ).first()
         self.assertIsNone(obj.null_atan2_sn)
         self.assertIsNone(obj.null_atan2_nb)
+        self.assertIsNone(obj.null_atan2_bn)
 
     def test_decimal(self):
         DecimalModel.objects.create(n1=Decimal('-9.9'), n2=Decimal('4.6'))
diff --git a/tests/db_functions/math/test_log.py b/tests/db_functions/math/test_log.py
index 469bb7cd3a..293993800a 100644
--- a/tests/db_functions/math/test_log.py
+++ b/tests/db_functions/math/test_log.py
@@ -14,9 +14,11 @@ class LogTests(TestCase):
         obj = IntegerModel.objects.annotate(
             null_log_small=Log('small', 'normal'),
             null_log_normal=Log('normal', 'big'),
+            null_log_big=Log('big', 'normal'),
         ).first()
         self.assertIsNone(obj.null_log_small)
         self.assertIsNone(obj.null_log_normal)
+        self.assertIsNone(obj.null_log_big)
 
     def test_decimal(self):
         DecimalModel.objects.create(n1=Decimal('12.9'), n2=Decimal('3.6'))
diff --git a/tests/db_functions/math/test_power.py b/tests/db_functions/math/test_power.py
index a2d6156e3d..94929d38b7 100644
--- a/tests/db_functions/math/test_power.py
+++ b/tests/db_functions/math/test_power.py
@@ -13,9 +13,11 @@ class PowerTests(TestCase):
         obj = IntegerModel.objects.annotate(
             null_power_small=Power('small', 'normal'),
             null_power_normal=Power('normal', 'big'),
+            null_power_big=Power('big', 'normal'),
         ).first()
         self.assertIsNone(obj.null_power_small)
         self.assertIsNone(obj.null_power_normal)
+        self.assertIsNone(obj.null_power_big)
 
     def test_decimal(self):
         DecimalModel.objects.create(n1=Decimal('1.0'), n2=Decimal('-0.6'))