diff --git a/scapy/asn1/ber.py b/scapy/asn1/ber.py
index 4ca705ec3..4c4526d32 100644
--- a/scapy/asn1/ber.py
+++ b/scapy/asn1/ber.py
@@ -258,7 +258,7 @@ class BERcodec_Object(six.with_metaclass(BERcodec_metaclass)):
 
     @classmethod
     def enc(cls, s):
-        if isinstance(s, basestring, bytes):
+        if isinstance(s, six.string_types):
             return BERcodec_STRING.enc(s)
         else:
             return BERcodec_INTEGER.enc(int(s))
diff --git a/test/regression.uts b/test/regression.uts
index 25a179c7b..64d882f1e 100644
--- a/test/regression.uts
+++ b/test/regression.uts
@@ -728,6 +728,40 @@ assert(x.PDU.varbindlist[0].value == b"172.31.19.2")
 assert(x.PDU.varbindlist[2].oid == "1.3.6.1.4.1.253.8.64.4.2.1.5.10.14130400")
 assert(x.PDU.varbindlist[2].value == 1)
 
+= ASN1 - ASN1_Object
+assert ASN1_Object(1) == ASN1_Object(1)
+assert ASN1_Object(1) > ASN1_Object(0)
+assert ASN1_Object(1) >= ASN1_Object(1)
+assert ASN1_Object(0) < ASN1_Object(1)
+assert ASN1_Object(1) <= ASN1_Object(2)
+assert ASN1_Object(1) != ASN1_Object(2)
+ASN1_Object(2).show()
+
+= ASN1 - RandASN1Object
+a = RandASN1Object()
+random.seed(0x2807)
+assert raw(a) in [b'A\x02\x07q', b'C\x02\xfe\x92', b'\x1e\x023V']
+
+= ASN1 - ASN1_BIT_STRING
+a = ASN1_BIT_STRING("test", "value")
+a
+assert raw(a) == b'test'
+
+= ASN1 - ASN1_SEQUENCE
+a = ASN1_SEQUENCE([ASN1_Object(1), ASN1_Object(0)])
+assert a.strshow() == '# ASN1_SEQUENCE:\n  <ASN1_Object[1]>\n  <ASN1_Object[0]>\n'
+
+= ASN1 - ASN1_DECODING_ERROR
+a = ASN1_DECODING_ERROR("error", exc=OSError(1))
+assert repr(a) == "<ASN1_DECODING_ERROR['error']{{1}}>"
+b = ASN1_DECODING_ERROR("error", exc=OSError(ASN1_BIT_STRING("0")))
+assert repr(b) == "<ASN1_DECODING_ERROR['error']{{\x00}}>"
+
+= ASN1 - ASN1_INTEGER
+a = ASN1_INTEGER(int("1"*23))
+assert repr(a) in ["0x25a55a46e5da99c71c7 <ASN1_INTEGER[1111111111...1111111111]>",
+                   "0x25a55a46e5da99c71c7 <ASN1_INTEGER[1111111111...111111111L]>"]
+
 
 ############
 ############
@@ -8958,6 +8992,18 @@ assert(len(conf.mib._find("MIB", "keyUsage")))
 
 assert(len(conf.mib._recurs_find_all((), "MIB", "keyUsage")))
 
+= MIB - graph
+
+@mock.patch("scapy.asn1.mib.do_graph")
+def get_mib_graph(do_graph):
+    def store_graph(graph, **kargs):
+        assert graph.startswith("""digraph "mib" {""")
+        assert """"test.2807" [ label="scapy"  ];""" in graph
+    do_graph.side_effect = store_graph
+    conf.mib._make_graph()
+
+get_mib_graph()
+
 = DADict tests
 
 a = DADict("test")