diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89d9109..851b621 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -71,7 +71,7 @@ jobs:
         for sdrf in testdata/*/*.sdrf.tsv
         do
           pushd $(dirname $sdrf)
-            python ../../parse_sdrf.py convert-openms -s $(pwd)/../../$sdrf -t2
+            python ../../parse_sdrf.py convert-openms -s $(pwd)/../../$sdrf -t2 --extension_convert raw:mzML
             diff -c experimental_design.tsv expected_experimental_design.tsv >> ../../failures.txt
             diff -c expected_openms.tsv openms.tsv >> ../../failures.txt
           popd