diff --git a/modules/nf-neuro/image/powderaverage/main.nf b/modules/nf-neuro/image/powderaverage/main.nf
index e83c765..445ffa2 100644
--- a/modules/nf-neuro/image/powderaverage/main.nf
+++ b/modules/nf-neuro/image/powderaverage/main.nf
@@ -32,7 +32,7 @@ process IMAGE_POWDERAVERAGE {
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
-        scilpy: 2.0.2
+        scilpy: \$(pip list | grep scilpy | tr -s ' ' | cut -d' ' -f2)
     END_VERSIONS
     """
 
@@ -46,7 +46,7 @@ process IMAGE_POWDERAVERAGE {
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
-        scilpy: 2.0.2
+        scilpy: \$(pip list | grep scilpy | tr -s ' ' | cut -d' ' -f2)
     END_VERSIONS
     """
 }
diff --git a/modules/nf-neuro/image/powderaverage/tests/main.nf.test b/modules/nf-neuro/image/powderaverage/tests/main.nf.test
index a5e46a5..edef057 100644
--- a/modules/nf-neuro/image/powderaverage/tests/main.nf.test
+++ b/modules/nf-neuro/image/powderaverage/tests/main.nf.test
@@ -24,7 +24,9 @@ nextflow_process {
         }
     }
 
-    test("powderaverage - no mask") {
+    test("powderaverage - no mask and no shell") {
+
+        config "./nextflow_noshells.config"
 
         when {
             process {
@@ -49,9 +51,9 @@ nextflow_process {
         }
     }
 
-    test("powderaverage - with mask") {
+    test("powderaverage - with mask and shells") {
 
-        config "./nextflow.config"
+        config "./nextflow_shells.config"
 
         when {
             process {
diff --git a/modules/nf-neuro/image/powderaverage/tests/main.nf.test.snap b/modules/nf-neuro/image/powderaverage/tests/main.nf.test.snap
index f3c724f..befe54a 100644
--- a/modules/nf-neuro/image/powderaverage/tests/main.nf.test.snap
+++ b/modules/nf-neuro/image/powderaverage/tests/main.nf.test.snap
@@ -1,5 +1,5 @@
 {
-    "powderaverage - with mask": {
+    "powderaverage - with mask and shells": {
         "content": [
             {
                 "0": [
@@ -29,12 +29,12 @@
             }
         ],
         "meta": {
-            "nf-test": "0.9.0-rc1",
-            "nextflow": "24.04.3"
+            "nf-test": "0.9.0",
+            "nextflow": "24.04.4"
         },
-        "timestamp": "2024-07-26T12:43:21.971071"
+        "timestamp": "2024-11-22T17:09:05.483883967"
     },
-    "powderaverage - no mask": {
+    "powderaverage - no mask and no shell": {
         "content": [
             {
                 "0": [
@@ -64,9 +64,9 @@
             }
         ],
         "meta": {
-            "nf-test": "0.9.0-rc1",
-            "nextflow": "24.04.3"
+            "nf-test": "0.9.0",
+            "nextflow": "24.04.4"
         },
-        "timestamp": "2024-07-25T14:32:47.643306"
+        "timestamp": "2024-11-22T19:45:06.796263708"
     }
 }
\ No newline at end of file
diff --git a/modules/nf-neuro/image/powderaverage/tests/nextflow_noshells.config b/modules/nf-neuro/image/powderaverage/tests/nextflow_noshells.config
new file mode 100644
index 0000000..ba09ca3
--- /dev/null
+++ b/modules/nf-neuro/image/powderaverage/tests/nextflow_noshells.config
@@ -0,0 +1,6 @@
+process {
+    withName: "IMAGE_POWDERAVERAGE" {
+        ext.b0_thr = 50
+        ext.shell_thr = 50
+    }
+}
diff --git a/modules/nf-neuro/image/powderaverage/tests/nextflow.config b/modules/nf-neuro/image/powderaverage/tests/nextflow_shells.config
similarity index 100%
rename from modules/nf-neuro/image/powderaverage/tests/nextflow.config
rename to modules/nf-neuro/image/powderaverage/tests/nextflow_shells.config