diff --git a/autotests/folding/highlight.hex.fold b/autotests/folding/highlight.hex.fold
new file mode 100644
index 0000000..7c3f3ea
--- /dev/null
+++ b/autotests/folding/highlight.hex.fold
@@ -0,0 +1,8 @@
+THIS IS INVALID
+:020000006428721
+:10000800803120007F08FD002700931D0C280D2853
+:0603D800890BEA29003444
+:020000040001F9
+:04000E0084EFFFDE9E
+:04000E0884EFFFDE9E
+:00000001FF
diff --git a/autotests/reference/highlight.hex.ref b/autotests/reference/highlight.hex.ref
new file mode 100644
index 0000000..ae09fd7
--- /dev/null
+++ b/autotests/reference/highlight.hex.ref
@@ -0,0 +1,8 @@
+<Malformed>THIS IS INVALID</Malformed><br/>
+<Startcode>:</Startcode><Bytecount>02</Bytecount><Address>0000</Address><RecordType>00</RecordType><Data>64287</Data><Checksum>21</Checksum><br/>
+<Startcode>:</Startcode><Bytecount>10</Bytecount><Address>0008</Address><RecordType>00</RecordType><Data>803120007F08FD002700931D0C280D28</Data><Checksum>53</Checksum><br/>
+<Startcode>:</Startcode><Bytecount>06</Bytecount><Address>03D8</Address><RecordType>00</RecordType><Data>890BEA290034</Data><Checksum>44</Checksum><br/>
+<Startcode>:</Startcode><Bytecount>02</Bytecount><Address>0000</Address><RecordType>04</RecordType><Data>0001</Data><Checksum>F9</Checksum><br/>
+<Startcode>:</Startcode><Bytecount>04</Bytecount><Address>000E</Address><RecordType>00</RecordType><Data>84EFFFDE</Data><Checksum>9E</Checksum><br/>
+<Startcode>:</Startcode><Bytecount>04</Bytecount><Address>000E</Address><Malformed>0884EFFFDE9E</Malformed><br/>
+<Startcode>:</Startcode><Bytecount>00</Bytecount><Address>0000</Address><RecordType>01</RecordType><Checksum>FF</Checksum><br/>