diff --git a/astrocyte_pkg.yml b/astrocyte_pkg.yml
index 15d19316fb384339aa32c01c5f531a68982b26cc..c95f69304e056d835eb6c46c47023c5c86c4decd 100644
--- a/astrocyte_pkg.yml
+++ b/astrocyte_pkg.yml
@@ -82,7 +82,7 @@ workflow_parameters:
     required: true
     description: |
       One or more input Tarball BCL files from a sequencing of 10x single-cell expereiment .
-    regex: ".*tar"
+    regex: ".*tar.gz"
     min: 1
 
   - id: designFile
diff --git a/workflow/main.nf b/workflow/main.nf
index 18e01b0d56d8687607b1f6648281cc2a71fa9878..b306f844f2de64e7b642e6d046c3252f0c747143 100644
--- a/workflow/main.nf
+++ b/workflow/main.nf
@@ -4,7 +4,7 @@
 // Note - $baseDir is the location of this workflow file main.nf
 
 // Define Input variables
-params.bcl = "$baseDir/../test_data/*.tar"
+params.bcl = "$baseDir/../test_data/*.tar.gz"
 params.designFile = "$baseDir/../test_data/design.csv"