diff --git a/tests/types/test_date_range.py b/tests/types/test_date_range.py
index e9fbe8e..238e30f 100644
--- a/tests/types/test_date_range.py
+++ b/tests/types/test_date_range.py
@@ -7,6 +7,7 @@ from sqlalchemy_utils import DateRangeType
 from tests import TestCase
 
 intervals = None
+inf = 0
 try:
     import intervals
     from infinity import inf
diff --git a/tests/types/test_datetime_range.py b/tests/types/test_datetime_range.py
index 7db85cb..b6bf731 100644
--- a/tests/types/test_datetime_range.py
+++ b/tests/types/test_datetime_range.py
@@ -7,6 +7,7 @@ from sqlalchemy_utils import DateTimeRangeType
 from tests import TestCase
 
 intervals = None
+inf = 0
 try:
     import intervals
     from infinity import inf
diff --git a/tests/types/test_numeric_range.py b/tests/types/test_numeric_range.py
index a238ef0..ad40acb 100644
--- a/tests/types/test_numeric_range.py
+++ b/tests/types/test_numeric_range.py
@@ -7,6 +7,7 @@ from sqlalchemy_utils import NumericRangeType
 from tests import TestCase
 
 intervals = None
+inf = 0
 try:
     import intervals
     from infinity import inf