diff --git a/test/uk/ac/sanger/artemis/components/variant/WriteVCFTest.java b/test/uk/ac/sanger/artemis/components/variant/WriteVCFTest.java
index 6fb0047c6e70aa6d9c8f2738d0fc714a7816d8cd..5222ac9f0476189250349770b7c4a03dd1c1bdc0 100644
--- a/test/uk/ac/sanger/artemis/components/variant/WriteVCFTest.java
+++ b/test/uk/ac/sanger/artemis/components/variant/WriteVCFTest.java
@@ -391,7 +391,7 @@ public class WriteVCFTest
     basesBuff.append("aagaaaggatataaaattgatatatttttaaatttttcttatatgaataatgaatataat");
     basesBuff.append("gacaaatttaattttattcaattagttactgaaatttttaataaaaataataatgtaatg");
     basesBuff.append("tttagaaatgaaaaattatatatgaataataataattatgaatttataaagaaattacat");
-    basesBuff.append("ttatttttaaatgctcctttttatttttttaatatgtttaataataacacaaaagaaatt");
+    basesBuff.append("ttatttttaaatgctcctttttatttttttaatatgtttaataataakacaaaagaaatt"); // multi-allele
     basesBuff.append("cgattagtacatgattataaatatacgacgaatttttataaaattcaaatatatatatac");
     basesBuff.append("ccaccgatacaaatacataaagcttctatcgttattcttgtctacgttaattttatatat");
     basesBuff.append("tattacatgtataattatccttttgtgttcttttatatttttgtttttttcttgagcttc");
@@ -424,17 +424,17 @@ public class WriteVCFTest
     basesBuff.append("gataataataatagtaataatagcaataataataataataataataataataatagtaat");
     basesBuff.append("gaatatacaaaaagaaagaatacacataaaaaacatttaaatgaacactataaaaatgag");
     basesBuff.append("agtaataagaaaaaggttaatgaaaagaaatacaataatagtgtgtatgttaataataat");
-    basesBuff.append("ataaagaaaaatcatgtaaacaaaaataaaaatgaaaattatttacaaaatgtgtggtta");
-    basesBuff.append("tttttattcgataatgaagttagaaaagaaaatgaacaatgtgttggaaaaattatatca");
+    basesBuff.append("ataaagaaaaatcatgtmaacaaaaataaaaatgaaaattatttacaaaatgtgtggtta"); // multi-allele m = A or C
+    basesBuff.append("tttttattcgataatgaagttagaaaagaaaatgamcaatgtgttggaaaaattatatca"); // multi-allele
     basesBuff.append("ctggatactttcaataccatagaaaaattttacaagaactataaatatatgaaatcgcct");
-    basesBuff.append("tcagccattaaggaatactacaacatttatctttttaaacataattttagacccctcttt");
+    basesBuff.append("tcagccattaaggaawamtacaacatttatctttttaaacawaattttagacccctcttt"); // multi-allele
     basesBuff.append("gacgaatatccaaatggttttatttgtaccgttaaaaatgccaatcattttaaaaatgac");
     basesBuff.append("agcgttgatataatatgggaaaaaatggttcttttggctataggagaagaatttagctta");
     basesBuff.append("atcgacttatgtggtttacaattatgcataagagataatgaaatgttttttaaaatatgg");
     basesBuff.append("atgaaaaattattcaaattatctaaaaaatatattgatgaaaaaattaagggacgcctac");
     basesBuff.append("aatgtatacaataacaaaaaaaatcaacaaggaaagggaaaaaatgaaaaggctaaaaag");
     basesBuff.append("aattacaataaaaataataagggcgcagaatttgtagctagtaaaaaggattctttaaaa");
-    basesBuff.append("atgcataattatccaaacatagtaccaccaccaaattatttaggaaattactatgtttac");
+    basesBuff.append("atgcataattatccaaacatagtaccaccaccaaattatttaggaaattacwatgtttac"); // multi-allele
     basesBuff.append("aaatacaacctagatatgaatttgttttatttatataataatcaaaatatgcctaacccg");
     basesBuff.append("tatatatacattcctgtcaatgtacccaataatcaatataataatatttatccagattat");
     basesBuff.append("atgtacgacagtaatacgagctatcctatagatataattaataataatttattaagtaat");