diff --git a/stix2/properties.py b/stix2/properties.py
index 4f1ebd2..bd1e114 100644
--- a/stix2/properties.py
+++ b/stix2/properties.py
@@ -556,10 +556,7 @@ class EnumProperty(StringProperty):
 
 
 class PatternProperty(StringProperty):
-
-    def clean(self, value):
-        cleaned_value = super(PatternProperty, self).clean(value)
-        return cleaned_value
+    pass
 
 
 class ObservableProperty(Property):
diff --git a/stix2/test/v20/test_indicator.py b/stix2/test/v20/test_indicator.py
index 8fe8d5d..f20c902 100644
--- a/stix2/test/v20/test_indicator.py
+++ b/stix2/test/v20/test_indicator.py
@@ -198,20 +198,6 @@ def test_indicator_stix21_invalid_pattern():
     now = dt.datetime(2017, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
     epoch = dt.datetime(1970, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
 
-    ind1 = stix2.v21.Indicator(
-        type="indicator",
-        id=INDICATOR_ID,
-        created=now,
-        modified=now,
-        pattern="[EXISTS windows-registry-key:values]",
-        pattern_type="stix",
-        valid_from=epoch,
-        indicator_types=['malicious-activity'],
-    )
-
-    assert ind1.id == INDICATOR_ID
-    assert ind1.pattern == "[EXISTS windows-registry-key:values]"
-
     with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
         stix2.v20.Indicator(
             type="indicator",
diff --git a/stix2/test/v21/test_indicator.py b/stix2/test/v21/test_indicator.py
index ff5c7cc..77f9fde 100644
--- a/stix2/test/v21/test_indicator.py
+++ b/stix2/test/v21/test_indicator.py
@@ -257,19 +257,6 @@ def test_indicator_stix20_invalid_pattern():
     now = dt.datetime(2017, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
     epoch = dt.datetime(1970, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
 
-    ind1 = stix2.v20.Indicator(
-        type="indicator",
-        id=INDICATOR_ID,
-        created=now,
-        modified=now,
-        pattern="[win-registry-key:key = 'hkey_local_machine\\\\foo\\\\bar'] WITHIN 5 SECONDS WITHIN 6 SECONDS",
-        valid_from=epoch,
-        labels=["malicious-activity"],
-    )
-
-    assert ind1.id == INDICATOR_ID
-    assert ind1.pattern == "[win-registry-key:key = 'hkey_local_machine\\\\foo\\\\bar'] WITHIN 5 SECONDS WITHIN 6 SECONDS"
-
     with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
         stix2.v21.Indicator(
             type="indicator",