diff --git a/Mikado/loci/superlocus.py b/Mikado/loci/superlocus.py
index 39d765dea..0e80f10d7 100644
--- a/Mikado/loci/superlocus.py
+++ b/Mikado/loci/superlocus.py
@@ -81,7 +81,7 @@ def __init__(self,
         """
 
         :param transcript_instance: an instance of the Transcript class
-        :type transcript_instance: Transcript
+        :type transcript_instance: [Transcript|None]
         :param stranded: boolean flag that indicates whether
         the Locus should use or ignore strand information
         :type stranded: bool
@@ -541,8 +541,6 @@ def _create_data_dict(self, engine, tid_keys):
                     score = int(ext.score)
                 elif ext.rtype == "float":
                     score = float(ext.score)
-                elif ext.rtype == "complex":
-                    score = complex(ext.score)
                 elif ext.rtype == "bool":
                     score = bool(int(ext.score))
                 else:
@@ -1348,7 +1346,7 @@ def is_intersecting(cls, transcript, other, cds_only=False):
 
         transcript.finalize()
         other.finalize()
-        if transcript.id == other.id:
+        if transcript == other:
             return False  # We do not want intersection with oneself
 
         if transcript.monoexonic is False and other.monoexonic is False:
diff --git a/Mikado/tests/locus_tester.py b/Mikado/tests/locus_tester.py
index 3ee7d57ab..2716fa37e 100644
--- a/Mikado/tests/locus_tester.py
+++ b/Mikado/tests/locus_tester.py
@@ -1299,6 +1299,93 @@ def test_remove_AS_overlapping(self):
             self.assertEqual(len(superlocus.loci[locus_two_id].transcripts), 1)
 
 
+class EmptySuperlocus(unittest.TestCase):
+
+    def test_empty(self):
+
+        logger = create_null_logger()
+        logger.setLevel("WARNING")
+        with self.assertLogs(logger, level="WARNING"):
+            _ = Superlocus(transcript_instance=None)
+
+
+class WrongSplitting(unittest.TestCase):
+
+    def test_split(self):
+
+        t1 = Transcript(BED12("Chr1\t100\t1000\tID=t1;coding=False\t0\t+\t100\t1000\t0\t1\t900\t0"))
+        t2 = Transcript(BED12("Chr1\t100\t1000\tID=t2;coding=False\t0\t-\t100\t1000\t0\t1\t900\t0"))
+        sl = Superlocus(t1, stranded=False)
+        sl.add_transcript_to_locus(t2)
+        splitted = list(sl.split_strands())
+        self.assertEqual(len(splitted), 2)
+        self.assertIsInstance(splitted[0], Superlocus)
+        self.assertIsInstance(splitted[1], Superlocus)
+        self.assertTrue(splitted[0].stranded)
+        self.assertTrue(splitted[1].stranded)
+
+    def test_invalid_split(self):
+        t1 = Transcript(BED12("Chr1\t100\t1000\tID=t1;coding=False\t0\t+\t100\t1000\t0\t1\t900\t0"))
+        t2 = Transcript(BED12("Chr1\t100\t1000\tID=t2;coding=False\t0\t+\t100\t1000\t0\t1\t900\t0"))
+
+        logger = create_default_logger("test_invalid_split", level="WARNING")
+        with self.assertLogs(logger=logger, level="WARNING") as cm:
+            sl = Superlocus(t1, stranded=True, logger=logger)
+            sl.add_transcript_to_locus(t2)
+            splitted = list(sl.split_strands())
+
+        self.assertEqual(splitted[0], sl)
+        self.assertEqual(len(splitted), 1)
+        self.assertIn("WARNING:test_invalid_split:Trying to split by strand a stranded Locus, {}!".format(sl.id),
+                      cm.output, cm.output)
+
+
+class WrongLoadingAndIntersecting(unittest.TestCase):
+
+    def test_wrong_loading(self):
+        t1 = Transcript(BED12("Chr1\t100\t1000\tID=t1;coding=False\t0\t+\t100\t1000\t0\t1\t900\t0"))
+        sl = Superlocus(t1, stranded=True)
+        with self.assertRaises(ValueError):
+            sl.load_all_transcript_data(engine=None, data_dict=None)
+
+    @unittest.skip
+    def test_already_loaded(self):
+        t1 = Transcript(BED12("Chr1\t100\t1000\tID=t1;coding=False\t0\t+\t100\t1000\t0\t1\t900\t0"))
+        sl = Superlocus(t1, stranded=True)
+
+    def test_wrong_intersecting(self):
+        t1 = Transcript(BED12("Chr1\t100\t1000\tID=t1;coding=False\t0\t+\t100\t1000\t0\t1\t900\t0"))
+        sl = Superlocus(t1, stranded=True)
+
+        with self.subTest():
+            self.assertFalse(sl.is_intersecting(t1, t1))
+        t2 = Transcript(BED12("Chr1\t100\t1000\tID=t1;coding=False\t0\t-\t100\t1000\t0\t1\t900\t0"))
+
+        with self.subTest():
+            self.assertTrue(sl.is_intersecting(t1, t2))
+
+    def test_coding_intersecting(self):
+        t1 = Transcript(BED12("Chr1\t100\t1000\tID=t1;coding=True\t0\t+\t200\t500\t0\t1\t900\t0"))
+        sl = Superlocus(t1, stranded=True)
+        t2 = Transcript(BED12("Chr1\t100\t1000\tID=t2;coding=True\t0\t+\t600\t900\t0\t1\t900\t0"))
+        t3 = Transcript(BED12("Chr1\t100\t1000\tID=t3;coding=True\t0\t+\t300\t600\t0\t1\t900\t0"))
+        t1.finalize()
+        t2.finalize()
+        t3.finalize()
+        self.assertTrue(t1.is_coding)
+        self.assertTrue(t2.is_coding)
+        self.assertTrue(t3.is_coding)
+        self.assertNotEqual(t1, t2)
+        self.assertNotEqual(t1, t3)
+
+        with self.subTest():
+            self.assertTrue(sl.is_intersecting(t1, t2, cds_only=False))
+            self.assertFalse(sl.is_intersecting(t1, t2, cds_only=True))
+        with self.subTest():
+            self.assertTrue(sl.is_intersecting(t1, t3, cds_only=False))
+            self.assertTrue(sl.is_intersecting(t1, t3, cds_only=True))
+
+
 class RetainedIntronTester(unittest.TestCase):
 
     def setUp(self):
diff --git a/Mikado/transcripts/transcript.py b/Mikado/transcripts/transcript.py
index 6b8b28a7f..2d2534808 100644
--- a/Mikado/transcripts/transcript.py
+++ b/Mikado/transcripts/transcript.py
@@ -489,16 +489,16 @@ def __eq__(self, other) -> bool:
 
         if not isinstance(self, type(other)):
             return False
-        # self.finalize()
-        # other.finalize()
 
-        if self.strand == other.strand and self.chrom == other.chrom:
-            if other.start == self.start:
-                if self.end == other.end:
-                    if self.exons == other.exons:
-                        return True
-
-        return False
+        return all([
+            self.strand == other.strand,
+            self.chrom == other.chrom,
+            self.start == other.start,
+            self.end == other.end,
+            self.exons == other.exons,
+            self.combined_cds == other.combined_cds,
+            self.internal_orfs == other.internal_orfs
+        ])
 
     def __hash__(self):
         """Returns the hash of the object (call to super().__hash__()).