diff --git a/.distriploy.yml b/.distriploy.yml
deleted file mode 100644
index 60b211b..0000000
--- a/.distriploy.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-release:
-  method: github
-
-mirrors:
-
-  osf:
-    method: osf
-    project: 6zbyf
-    folder: data
-
-postrelease:
-  add_mirror_urls: true
-
diff --git a/README.md b/README.md
index e114123..e06eaa5 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,5 @@
-sct_example_data
+sct_testing_data
 ================
 
-Example data for the Spinal Cord Toolbox (errsm_30).
+Testing data for the [`spinalcordtoolbox`](https://github.com/neuropoly/spinalcordtoolbox).
 
-To release after changes, use [distriploy](https://github.com/neuropoly/distriploy/):
-```bash
-distriploy --revision rYYYYMMDD release
-```
diff --git a/setup.py b/setup.py
index 5eaee53..91a59e8 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 import site, sys; site.ENABLE_USER_SITE = True
 
 setup(
-  name='spinalcordtoolbox-data-<dataset>',
+  name='spinalcordtoolbox-data-testing',
   description='Part of https://github.com/neuropoly/spinalcordtoolbox',
   long_description=(here / 'README.md').read_text(encoding='utf-8'),
   long_description_content_type='text/markdown',
@@ -16,11 +16,10 @@
   author_email='neuropoly@googlegroups.com',
   url='https://spinalcordtoolbox.com/',
   project_urls={
-      'Source': 'https://github.com/sct-data/<dataset>',
+      'Source': 'https://github.com/sct-data/sct_testing_data',
       #'Documentation': '',
   },
-  #license='CC-BY-NC', ??
-  #license_files=[ ... ] # TODO?
+  license_files=[ 'LICENSE' ],
 
   packages=find_namespace_packages('src/'),
   package_dir={"":"src/"},
diff --git a/src/spinalcordtoolbox/data/dataset/__init__.py b/src/spinalcordtoolbox/testing/data/__init__.py
similarity index 100%
rename from src/spinalcordtoolbox/data/dataset/__init__.py
rename to src/spinalcordtoolbox/testing/data/__init__.py
diff --git a/src/spinalcordtoolbox/testing/data/dmri/__init__.py b/src/spinalcordtoolbox/testing/data/dmri/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/dmri/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/dmri/bvals.txt b/src/spinalcordtoolbox/testing/data/dmri/bvals.txt
similarity index 100%
rename from dmri/bvals.txt
rename to src/spinalcordtoolbox/testing/data/dmri/bvals.txt
diff --git a/dmri/bvecs.txt b/src/spinalcordtoolbox/testing/data/dmri/bvecs.txt
similarity index 100%
rename from dmri/bvecs.txt
rename to src/spinalcordtoolbox/testing/data/dmri/bvecs.txt
diff --git a/dmri/dmri.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri.nii.gz
similarity index 100%
rename from dmri/dmri.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri.nii.gz
diff --git a/dmri/dmri_T0000.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri_T0000.nii.gz
similarity index 100%
rename from dmri/dmri_T0000.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri_T0000.nii.gz
diff --git a/dmri/dmri_T0001.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri_T0001.nii.gz
similarity index 100%
rename from dmri/dmri_T0001.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri_T0001.nii.gz
diff --git a/dmri/dmri_T0002.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri_T0002.nii.gz
similarity index 100%
rename from dmri/dmri_T0002.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri_T0002.nii.gz
diff --git a/dmri/dmri_T0003.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri_T0003.nii.gz
similarity index 100%
rename from dmri/dmri_T0003.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri_T0003.nii.gz
diff --git a/dmri/dmri_T0004.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri_T0004.nii.gz
similarity index 100%
rename from dmri/dmri_T0004.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri_T0004.nii.gz
diff --git a/dmri/dmri_T0005.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri_T0005.nii.gz
similarity index 100%
rename from dmri/dmri_T0005.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri_T0005.nii.gz
diff --git a/dmri/dmri_T0006.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dmri_T0006.nii.gz
similarity index 100%
rename from dmri/dmri_T0006.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dmri_T0006.nii.gz
diff --git a/dmri/dwi.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dwi.nii.gz
similarity index 100%
rename from dmri/dwi.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dwi.nii.gz
diff --git a/dmri/dwi_mean.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dwi_mean.nii.gz
similarity index 100%
rename from dmri/dwi_mean.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dwi_mean.nii.gz
diff --git a/dmri/dwi_mean_centerline-optic.csv b/src/spinalcordtoolbox/testing/data/dmri/dwi_mean_centerline-optic.csv
similarity index 100%
rename from dmri/dwi_mean_centerline-optic.csv
rename to src/spinalcordtoolbox/testing/data/dmri/dwi_mean_centerline-optic.csv
diff --git a/dmri/dwi_mean_centerline-optic.nii.gz b/src/spinalcordtoolbox/testing/data/dmri/dwi_mean_centerline-optic.nii.gz
similarity index 100%
rename from dmri/dwi_mean_centerline-optic.nii.gz
rename to src/spinalcordtoolbox/testing/data/dmri/dwi_mean_centerline-optic.nii.gz
diff --git a/dmribvecs.txt b/src/spinalcordtoolbox/testing/data/dmribvecs.txt
similarity index 100%
rename from dmribvecs.txt
rename to src/spinalcordtoolbox/testing/data/dmribvecs.txt
diff --git a/src/spinalcordtoolbox/testing/data/fmri/__init__.py b/src/spinalcordtoolbox/testing/data/fmri/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/fmri/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/fmri/fmri.nii.gz b/src/spinalcordtoolbox/testing/data/fmri/fmri.nii.gz
similarity index 100%
rename from fmri/fmri.nii.gz
rename to src/spinalcordtoolbox/testing/data/fmri/fmri.nii.gz
diff --git a/fmri/fmri_r.nii.gz b/src/spinalcordtoolbox/testing/data/fmri/fmri_r.nii.gz
similarity index 100%
rename from fmri/fmri_r.nii.gz
rename to src/spinalcordtoolbox/testing/data/fmri/fmri_r.nii.gz
diff --git a/fmri/fmri_tsnr.nii.gz b/src/spinalcordtoolbox/testing/data/fmri/fmri_tsnr.nii.gz
similarity index 100%
rename from fmri/fmri_tsnr.nii.gz
rename to src/spinalcordtoolbox/testing/data/fmri/fmri_tsnr.nii.gz
diff --git a/mt/README.md b/src/spinalcordtoolbox/testing/data/mt/README.md
similarity index 100%
rename from mt/README.md
rename to src/spinalcordtoolbox/testing/data/mt/README.md
diff --git a/src/spinalcordtoolbox/testing/data/mt/__init__.py b/src/spinalcordtoolbox/testing/data/mt/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/mt/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/src/spinalcordtoolbox/testing/data/mt/label/__init__.py b/src/spinalcordtoolbox/testing/data/mt/label/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/mt/label/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/mt/label/atlas/PAM50_atlas_00.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_00.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_00.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_00.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_01.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_01.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_01.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_01.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_02.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_02.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_02.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_02.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_03.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_03.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_03.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_03.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_04.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_04.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_04.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_04.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_05.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_05.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_05.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_05.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_06.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_06.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_06.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_06.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_07.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_07.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_07.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_07.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_08.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_08.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_08.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_08.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_09.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_09.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_09.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_09.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_10.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_10.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_10.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_10.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_11.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_11.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_11.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_11.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_12.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_12.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_12.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_12.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_13.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_13.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_13.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_13.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_14.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_14.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_14.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_14.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_15.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_15.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_15.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_15.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_16.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_16.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_16.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_16.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_17.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_17.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_17.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_17.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_18.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_18.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_18.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_18.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_19.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_19.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_19.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_19.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_20.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_20.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_20.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_20.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_21.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_21.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_21.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_21.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_22.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_22.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_22.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_22.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_23.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_23.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_23.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_23.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_24.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_24.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_24.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_24.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_25.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_25.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_25.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_25.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_26.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_26.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_26.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_26.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_27.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_27.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_27.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_27.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_28.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_28.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_28.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_28.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_29.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_29.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_29.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_29.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_30.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_30.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_30.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_30.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_31.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_31.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_31.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_31.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_32.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_32.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_32.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_32.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_33.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_33.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_33.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_33.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_34.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_34.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_34.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_34.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_35.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_35.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_35.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_35.nii.gz
diff --git a/mt/label/atlas/PAM50_atlas_36.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_36.nii.gz
similarity index 100%
rename from mt/label/atlas/PAM50_atlas_36.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/PAM50_atlas_36.nii.gz
diff --git a/src/spinalcordtoolbox/testing/data/mt/label/atlas/__init__.py b/src/spinalcordtoolbox/testing/data/mt/label/atlas/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/mt/label/atlas/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/mt/label/atlas/info_label.txt b/src/spinalcordtoolbox/testing/data/mt/label/atlas/info_label.txt
similarity index 100%
rename from mt/label/atlas/info_label.txt
rename to src/spinalcordtoolbox/testing/data/mt/label/atlas/info_label.txt
diff --git a/mt/label/template/PAM50_cord.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_cord.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_cord.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_cord.nii.gz
diff --git a/mt/label/template/PAM50_csf.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_csf.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_csf.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_csf.nii.gz
diff --git a/mt/label/template/PAM50_gm.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_gm.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_gm.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_gm.nii.gz
diff --git a/mt/label/template/PAM50_levels.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_levels.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_levels.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_levels.nii.gz
diff --git a/mt/label/template/PAM50_t1.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_t1.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_t1.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_t1.nii.gz
diff --git a/mt/label/template/PAM50_t2.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_t2.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_t2.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_t2.nii.gz
diff --git a/mt/label/template/PAM50_t2s.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_t2s.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_t2s.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_t2s.nii.gz
diff --git a/mt/label/template/PAM50_wm.nii.gz b/src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_wm.nii.gz
similarity index 100%
rename from mt/label/template/PAM50_wm.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/label/template/PAM50_wm.nii.gz
diff --git a/src/spinalcordtoolbox/testing/data/mt/label/template/__init__.py b/src/spinalcordtoolbox/testing/data/mt/label/template/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/mt/label/template/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/mt/label/template/info_label.txt b/src/spinalcordtoolbox/testing/data/mt/label/template/info_label.txt
similarity index 100%
rename from mt/label/template/info_label.txt
rename to src/spinalcordtoolbox/testing/data/mt/label/template/info_label.txt
diff --git a/mt/mt0.json b/src/spinalcordtoolbox/testing/data/mt/mt0.json
similarity index 100%
rename from mt/mt0.json
rename to src/spinalcordtoolbox/testing/data/mt/mt0.json
diff --git a/mt/mt0.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt0.nii.gz
similarity index 100%
rename from mt/mt0.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt0.nii.gz
diff --git a/mt/mt0_mask_viewer.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt0_mask_viewer.nii.gz
similarity index 100%
rename from mt/mt0_mask_viewer.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt0_mask_viewer.nii.gz
diff --git a/mt/mt0_reg_slicereg_goldstandard.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt0_reg_slicereg_goldstandard.nii.gz
similarity index 100%
rename from mt/mt0_reg_slicereg_goldstandard.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt0_reg_slicereg_goldstandard.nii.gz
diff --git a/mt/mt0_reg_syn_goldstandard.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt0_reg_syn_goldstandard.nii.gz
similarity index 100%
rename from mt/mt0_reg_syn_goldstandard.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt0_reg_syn_goldstandard.nii.gz
diff --git a/mt/mt0_seg.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt0_seg.nii.gz
similarity index 100%
rename from mt/mt0_seg.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt0_seg.nii.gz
diff --git a/mt/mt1.json b/src/spinalcordtoolbox/testing/data/mt/mt1.json
similarity index 100%
rename from mt/mt1.json
rename to src/spinalcordtoolbox/testing/data/mt/mt1.json
diff --git a/mt/mt1.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt1.nii.gz
similarity index 100%
rename from mt/mt1.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt1.nii.gz
diff --git a/mt/mt1_gmseg.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt1_gmseg.nii.gz
similarity index 100%
rename from mt/mt1_gmseg.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt1_gmseg.nii.gz
diff --git a/mt/mt1_gmseg_goldstandard.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt1_gmseg_goldstandard.nii.gz
similarity index 100%
rename from mt/mt1_gmseg_goldstandard.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt1_gmseg_goldstandard.nii.gz
diff --git a/mt/mt1_point.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt1_point.nii.gz
similarity index 100%
rename from mt/mt1_point.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt1_point.nii.gz
diff --git a/mt/mt1_seg.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt1_seg.nii.gz
similarity index 100%
rename from mt/mt1_seg.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt1_seg.nii.gz
diff --git a/mt/mt1_wmseg.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mt1_wmseg.nii.gz
similarity index 100%
rename from mt/mt1_wmseg.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mt1_wmseg.nii.gz
diff --git a/mt/mtr.nii.gz b/src/spinalcordtoolbox/testing/data/mt/mtr.nii.gz
similarity index 100%
rename from mt/mtr.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/mtr.nii.gz
diff --git a/mt/step1TxTy_poly_groundtruth.csv b/src/spinalcordtoolbox/testing/data/mt/step1TxTy_poly_groundtruth.csv
similarity index 100%
rename from mt/step1TxTy_poly_groundtruth.csv
rename to src/spinalcordtoolbox/testing/data/mt/step1TxTy_poly_groundtruth.csv
diff --git a/mt/t1w.json b/src/spinalcordtoolbox/testing/data/mt/t1w.json
similarity index 100%
rename from mt/t1w.json
rename to src/spinalcordtoolbox/testing/data/mt/t1w.json
diff --git a/mt/t1w.nii.gz b/src/spinalcordtoolbox/testing/data/mt/t1w.nii.gz
similarity index 100%
rename from mt/t1w.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/t1w.nii.gz
diff --git a/mt/warp_t22mt1.nii.gz b/src/spinalcordtoolbox/testing/data/mt/warp_t22mt1.nii.gz
similarity index 100%
rename from mt/warp_t22mt1.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/warp_t22mt1.nii.gz
diff --git a/mt/warp_template2mt.nii.gz b/src/spinalcordtoolbox/testing/data/mt/warp_template2mt.nii.gz
similarity index 100%
rename from mt/warp_template2mt.nii.gz
rename to src/spinalcordtoolbox/testing/data/mt/warp_template2mt.nii.gz
diff --git a/src/spinalcordtoolbox/testing/data/t1/__init__.py b/src/spinalcordtoolbox/testing/data/t1/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/t1/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/t1/init_label_vertebrae.txt b/src/spinalcordtoolbox/testing/data/t1/init_label_vertebrae.txt
similarity index 100%
rename from t1/init_label_vertebrae.txt
rename to src/spinalcordtoolbox/testing/data/t1/init_label_vertebrae.txt
diff --git a/t1/t1w.nii.gz b/src/spinalcordtoolbox/testing/data/t1/t1w.nii.gz
similarity index 100%
rename from t1/t1w.nii.gz
rename to src/spinalcordtoolbox/testing/data/t1/t1w.nii.gz
diff --git a/t1/t1w_seg-manual.nii.gz b/src/spinalcordtoolbox/testing/data/t1/t1w_seg-manual.nii.gz
similarity index 100%
rename from t1/t1w_seg-manual.nii.gz
rename to src/spinalcordtoolbox/testing/data/t1/t1w_seg-manual.nii.gz
diff --git a/t2/README.md b/src/spinalcordtoolbox/testing/data/t2/README.md
similarity index 100%
rename from t2/README.md
rename to src/spinalcordtoolbox/testing/data/t2/README.md
diff --git a/src/spinalcordtoolbox/testing/data/t2/__init__.py b/src/spinalcordtoolbox/testing/data/t2/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/t2/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/t2/init_label_vertebrae.txt b/src/spinalcordtoolbox/testing/data/t2/init_label_vertebrae.txt
similarity index 100%
rename from t2/init_label_vertebrae.txt
rename to src/spinalcordtoolbox/testing/data/t2/init_label_vertebrae.txt
diff --git a/t2/labels.nii.gz b/src/spinalcordtoolbox/testing/data/t2/labels.nii.gz
similarity index 100%
rename from t2/labels.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/labels.nii.gz
diff --git a/t2/t2.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2.nii.gz
similarity index 100%
rename from t2/t2.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2.nii.gz
diff --git a/t2/t2_centerline-manual.csv b/src/spinalcordtoolbox/testing/data/t2/t2_centerline-manual.csv
similarity index 100%
rename from t2/t2_centerline-manual.csv
rename to src/spinalcordtoolbox/testing/data/t2/t2_centerline-manual.csv
diff --git a/t2/t2_centerline-manual.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2_centerline-manual.nii.gz
similarity index 100%
rename from t2/t2_centerline-manual.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2_centerline-manual.nii.gz
diff --git a/t2/t2_centerline-optic.csv b/src/spinalcordtoolbox/testing/data/t2/t2_centerline-optic.csv
similarity index 100%
rename from t2/t2_centerline-optic.csv
rename to src/spinalcordtoolbox/testing/data/t2/t2_centerline-optic.csv
diff --git a/t2/t2_centerline-optic.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2_centerline-optic.nii.gz
similarity index 100%
rename from t2/t2_centerline-optic.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2_centerline-optic.nii.gz
diff --git a/t2/t2_contrast_1_mean_ref.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2_contrast_1_mean_ref.nii.gz
similarity index 100%
rename from t2/t2_contrast_1_mean_ref.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2_contrast_1_mean_ref.nii.gz
diff --git a/t2/t2_labeled_center_manual.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2_labeled_center_manual.nii.gz
similarity index 100%
rename from t2/t2_labeled_center_manual.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2_labeled_center_manual.nii.gz
diff --git a/t2/t2_seg-deepseg_sc-2d.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2_seg-deepseg_sc-2d.nii.gz
similarity index 100%
rename from t2/t2_seg-deepseg_sc-2d.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2_seg-deepseg_sc-2d.nii.gz
diff --git a/t2/t2_seg-deepseg_sc-3d.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2_seg-deepseg_sc-3d.nii.gz
similarity index 100%
rename from t2/t2_seg-deepseg_sc-3d.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2_seg-deepseg_sc-3d.nii.gz
diff --git a/t2/t2_seg-manual.nii.gz b/src/spinalcordtoolbox/testing/data/t2/t2_seg-manual.nii.gz
similarity index 100%
rename from t2/t2_seg-manual.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/t2_seg-manual.nii.gz
diff --git a/t2/warp_template2anat.nii.gz b/src/spinalcordtoolbox/testing/data/t2/warp_template2anat.nii.gz
similarity index 100%
rename from t2/warp_template2anat.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2/warp_template2anat.nii.gz
diff --git a/t2s/MNI-Poly-AMU_level_crop.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/MNI-Poly-AMU_level_crop.nii.gz
similarity index 100%
rename from t2s/MNI-Poly-AMU_level_crop.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/MNI-Poly-AMU_level_crop.nii.gz
diff --git a/src/spinalcordtoolbox/testing/data/t2s/__init__.py b/src/spinalcordtoolbox/testing/data/t2s/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/t2s/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/t2s/t2s.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/t2s.nii.gz
similarity index 100%
rename from t2s/t2s.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/t2s.nii.gz
diff --git a/t2s/t2s_centerline-optic.csv b/src/spinalcordtoolbox/testing/data/t2s/t2s_centerline-optic.csv
similarity index 100%
rename from t2s/t2s_centerline-optic.csv
rename to src/spinalcordtoolbox/testing/data/t2s/t2s_centerline-optic.csv
diff --git a/t2s/t2s_centerline-optic.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/t2s_centerline-optic.nii.gz
similarity index 100%
rename from t2s/t2s_centerline-optic.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/t2s_centerline-optic.nii.gz
diff --git a/t2s/t2s_gmseg_manual.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/t2s_gmseg_manual.nii.gz
similarity index 100%
rename from t2s/t2s_gmseg_manual.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/t2s_gmseg_manual.nii.gz
diff --git a/t2s/t2s_seg-deepseg.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/t2s_seg-deepseg.nii.gz
similarity index 100%
rename from t2s/t2s_seg-deepseg.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/t2s_seg-deepseg.nii.gz
diff --git a/t2s/t2s_seg.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/t2s_seg.nii.gz
similarity index 100%
rename from t2s/t2s_seg.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/t2s_seg.nii.gz
diff --git a/t2s/t2s_uncropped.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/t2s_uncropped.nii.gz
similarity index 100%
rename from t2s/t2s_uncropped.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/t2s_uncropped.nii.gz
diff --git a/t2s/t2s_uncropped_gmseg_manual.nii.gz b/src/spinalcordtoolbox/testing/data/t2s/t2s_uncropped_gmseg_manual.nii.gz
similarity index 100%
rename from t2s/t2s_uncropped_gmseg_manual.nii.gz
rename to src/spinalcordtoolbox/testing/data/t2s/t2s_uncropped_gmseg_manual.nii.gz
diff --git a/template/README.md b/src/spinalcordtoolbox/testing/data/template/README.md
similarity index 100%
rename from template/README.md
rename to src/spinalcordtoolbox/testing/data/template/README.md
diff --git a/src/spinalcordtoolbox/testing/data/template/__init__.py b/src/spinalcordtoolbox/testing/data/template/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/template/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/template/template/PAM50_small_cord.nii.gz b/src/spinalcordtoolbox/testing/data/template/template/PAM50_small_cord.nii.gz
similarity index 100%
rename from template/template/PAM50_small_cord.nii.gz
rename to src/spinalcordtoolbox/testing/data/template/template/PAM50_small_cord.nii.gz
diff --git a/template/template/PAM50_small_label_disc.nii.gz b/src/spinalcordtoolbox/testing/data/template/template/PAM50_small_label_disc.nii.gz
similarity index 100%
rename from template/template/PAM50_small_label_disc.nii.gz
rename to src/spinalcordtoolbox/testing/data/template/template/PAM50_small_label_disc.nii.gz
diff --git a/template/template/PAM50_small_label_discPosterior.nii.gz b/src/spinalcordtoolbox/testing/data/template/template/PAM50_small_label_discPosterior.nii.gz
similarity index 100%
rename from template/template/PAM50_small_label_discPosterior.nii.gz
rename to src/spinalcordtoolbox/testing/data/template/template/PAM50_small_label_discPosterior.nii.gz
diff --git a/template/template/PAM50_small_levels.nii.gz b/src/spinalcordtoolbox/testing/data/template/template/PAM50_small_levels.nii.gz
similarity index 100%
rename from template/template/PAM50_small_levels.nii.gz
rename to src/spinalcordtoolbox/testing/data/template/template/PAM50_small_levels.nii.gz
diff --git a/template/template/PAM50_small_t2.nii.gz b/src/spinalcordtoolbox/testing/data/template/template/PAM50_small_t2.nii.gz
similarity index 100%
rename from template/template/PAM50_small_t2.nii.gz
rename to src/spinalcordtoolbox/testing/data/template/template/PAM50_small_t2.nii.gz
diff --git a/template/template/PAM50_small_t2_pmj_manual.nii.gz b/src/spinalcordtoolbox/testing/data/template/template/PAM50_small_t2_pmj_manual.nii.gz
similarity index 100%
rename from template/template/PAM50_small_t2_pmj_manual.nii.gz
rename to src/spinalcordtoolbox/testing/data/template/template/PAM50_small_t2_pmj_manual.nii.gz
diff --git a/src/spinalcordtoolbox/testing/data/template/template/__init__.py b/src/spinalcordtoolbox/testing/data/template/template/__init__.py
new file mode 100644
index 0000000..ead4c67
--- /dev/null
+++ b/src/spinalcordtoolbox/testing/data/template/template/__init__.py
@@ -0,0 +1,2 @@
+# empty __init__.py to enable importlib.resources
+# see < TODO >
diff --git a/template/template/info_label.txt b/src/spinalcordtoolbox/testing/data/template/template/info_label.txt
similarity index 100%
rename from template/template/info_label.txt
rename to src/spinalcordtoolbox/testing/data/template/template/info_label.txt