diff --git a/tests/test_fields.py b/tests/test_fields.py
index 04c721d36..61d39aff6 100644
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -640,8 +640,8 @@ class TestDateField(FieldValues):
         datetime.date(2001, 1, 1): datetime.date(2001, 1, 1),
     }
     invalid_inputs = {
-        'abc': ['Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]]'],
-        '2001-99-99': ['Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]]'],
+        'abc': ['Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]].'],
+        '2001-99-99': ['Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]].'],
         datetime.datetime(2001, 1, 1, 12, 00): ['Expected a date but got a datetime.'],
     }
     outputs = {
@@ -658,7 +658,7 @@ class TestCustomInputFormatDateField(FieldValues):
         '1 Jan 2001': datetime.date(2001, 1, 1),
     }
     invalid_inputs = {
-        '2001-01-01': ['Date has wrong format. Use one of these formats instead: DD [Jan-Dec] YYYY']
+        '2001-01-01': ['Date has wrong format. Use one of these formats instead: DD [Jan-Dec] YYYY.']
     }
     outputs = {}
     field = serializers.DateField(input_formats=['%d %b %Y'])
@@ -702,8 +702,8 @@ class TestDateTimeField(FieldValues):
         '2001-01-01T14:00+01:00' if (django.VERSION > (1, 4)) else '2001-01-01T13:00Z': datetime.datetime(2001, 1, 1, 13, 00, tzinfo=timezone.UTC())
     }
     invalid_inputs = {
-        'abc': ['Datetime has wrong format. Use one of these formats instead: YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HH:MM|-HH:MM|Z]'],
-        '2001-99-99T99:00': ['Datetime has wrong format. Use one of these formats instead: YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HH:MM|-HH:MM|Z]'],
+        'abc': ['Datetime has wrong format. Use one of these formats instead: YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HH:MM|-HH:MM|Z].'],
+        '2001-99-99T99:00': ['Datetime has wrong format. Use one of these formats instead: YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HH:MM|-HH:MM|Z].'],
         datetime.date(2001, 1, 1): ['Expected a datetime but got a date.'],
     }
     outputs = {
@@ -721,7 +721,7 @@ class TestCustomInputFormatDateTimeField(FieldValues):
         '1:35pm, 1 Jan 2001': datetime.datetime(2001, 1, 1, 13, 35, tzinfo=timezone.UTC()),
     }
     invalid_inputs = {
-        '2001-01-01T20:50': ['Datetime has wrong format. Use one of these formats instead: hh:mm[AM|PM], DD [Jan-Dec] YYYY']
+        '2001-01-01T20:50': ['Datetime has wrong format. Use one of these formats instead: hh:mm[AM|PM], DD [Jan-Dec] YYYY.']
     }
     outputs = {}
     field = serializers.DateTimeField(default_timezone=timezone.UTC(), input_formats=['%I:%M%p, %d %b %Y'])
@@ -773,8 +773,8 @@ class TestTimeField(FieldValues):
         datetime.time(13, 00): datetime.time(13, 00),
     }
     invalid_inputs = {
-        'abc': ['Time has wrong format. Use one of these formats instead: hh:mm[:ss[.uuuuuu]]'],
-        '99:99': ['Time has wrong format. Use one of these formats instead: hh:mm[:ss[.uuuuuu]]'],
+        'abc': ['Time has wrong format. Use one of these formats instead: hh:mm[:ss[.uuuuuu]].'],
+        '99:99': ['Time has wrong format. Use one of these formats instead: hh:mm[:ss[.uuuuuu]].'],
     }
     outputs = {
         datetime.time(13, 00): '13:00:00'
@@ -790,7 +790,7 @@ class TestCustomInputFormatTimeField(FieldValues):
         '1:00pm': datetime.time(13, 00),
     }
     invalid_inputs = {
-        '13:00': ['Time has wrong format. Use one of these formats instead: hh:mm[AM|PM]'],
+        '13:00': ['Time has wrong format. Use one of these formats instead: hh:mm[AM|PM].'],
     }
     outputs = {}
     field = serializers.TimeField(input_formats=['%I:%M%p'])
@@ -1028,7 +1028,7 @@ class TestListField(FieldValues):
         (['1', '2', '3'], [1, 2, 3])
     ]
     invalid_inputs = [
-        ('not a list', ['Expected a list of items but got type `str`']),
+        ('not a list', ['Expected a list of items but got type `str`.']),
         ([1, 2, 'error'], ['A valid integer is required.'])
     ]
     outputs = [