diff --git a/modules/nf-scil/registration/synthregistration/main.nf b/modules/nf-scil/registration/synthregistration/main.nf
index fb3b8593..3e168eba 100644
--- a/modules/nf-scil/registration/synthregistration/main.nf
+++ b/modules/nf-scil/registration/synthregistration/main.nf
@@ -2,7 +2,7 @@ process REGISTRATION_SYNTHREGISTRATION {
     tag "$meta.id"
     label 'process_single'
 
-    container "freesurfer/synthmorph:2"
+    container "freesurfer/synthmorph:3"
     containerOptions "--entrypoint ''"
 
     input:
diff --git a/modules/nf-scil/registration/synthregistration/tests/main.nf.test b/modules/nf-scil/registration/synthregistration/tests/main.nf.test
index aecf6ee7..fa8f9945 100644
--- a/modules/nf-scil/registration/synthregistration/tests/main.nf.test
+++ b/modules/nf-scil/registration/synthregistration/tests/main.nf.test
@@ -42,8 +42,8 @@ nextflow_process {
             assertAll(
                 { assert process.success },
                 { assert snapshot(
-                    Nifti_md5sum(process.out.warped_image.get(0).get(1)),
-                    Nifti_md5sum(process.out.deform_transform.get(0).get(1)),
+                    niftiMD5SUM(process.out.warped_image.get(0).get(1)),
+                    niftiMD5SUM(process.out.deform_transform.get(0).get(1)),
                     file(process.out.init_transform.get(0).get(1)),
                     process.out.versions
                 ).match() }
diff --git a/modules/nf-scil/registration/synthregistration/tests/main.nf.test.snap b/modules/nf-scil/registration/synthregistration/tests/main.nf.test.snap
index b1a2fb83..2a496d24 100644
--- a/modules/nf-scil/registration/synthregistration/tests/main.nf.test.snap
+++ b/modules/nf-scil/registration/synthregistration/tests/main.nf.test.snap
@@ -1,8 +1,8 @@
 {
     "registration - synthregistration": {
         "content": [
-            "test__output_warped.nii.gz:md5,b8f38768bc1e0860593f3282c41f1551",
-            "test__deform_warp.nii.gz:md5,a7b8ffcf75af954087b4993717db90c0",
+            "test__output_warped.nii.gz:md5:header,7194a6bc4e939bcdcde2eb49dfe86e99,data,bec9bc1da19ef79e3a2b2139605194d1",
+            "test__deform_warp.nii.gz:md5:header,1c5ab0add89b78f9676438b03a401d7b,data,080fe63c2e7711cb1c1db61523ec4a19",
             "test__init_warp.lta:md5,8759b302c2609351b3467ef4ceaac0af",
             [
                 "versions.yml:md5,49fb9c85da9f696926d1ab46ef0968fb"
@@ -12,6 +12,6 @@
             "nf-test": "0.9.0-rc1",
             "nextflow": "24.04.4"
         },
-        "timestamp": "2024-08-15T17:53:02.358738"
+        "timestamp": "2024-09-07T18:29:01.73367"
     }
 }
\ No newline at end of file