diff --git a/conf/test.config b/conf/test.config
index 8ad70cae..1801bc09 100644
--- a/conf/test.config
+++ b/conf/test.config
@@ -25,7 +25,7 @@ params {
     input     = "${projectDir}/assets/test/samplesheet_s3.csv"
 
     // Fasta references
-    fasta     = "https://tolit.cog.sanger.ac.uk/test-data/Meles_meles/assembly/release/mMelMel3.1_paternal_haplotype/GCA_922984935.2.subset.fasta.gz"
+    fasta     = "https://tolit.cog.sanger.ac.uk/test-data/Meles_meles/assembly/release/mMelMel3.1_paternal_haplotype/GCA_922984935.2.subset.phiXspike.fasta.gz"
     accession = "GCA_922984935.2"
     taxon     = "Meles meles"