diff --git a/clinicadl/utils/clinica_utils.py b/clinicadl/utils/clinica_utils.py
index 3cf0a5f97..16525427f 100644
--- a/clinicadl/utils/clinica_utils.py
+++ b/clinicadl/utils/clinica_utils.py
@@ -156,7 +156,7 @@ def pet_linear_nii(
     information = {
         "pattern": str(
             Path("pet_linear")
-            / f"*_trc-{acq_label}_pet_space-MNI152NLin2009cSym{description}_res-1x1x1_suvr-{suvr_reference_region}_pet.nii.gz"
+            / f"*_trc-{acq_label}_space-MNI152NLin2009cSym{description}_res-1x1x1_suvr-{suvr_reference_region}_pet.nii.gz"
         ),
         "description": "",
         "needed_pipeline": "pet-linear",
diff --git a/tests/unittests/utils/test_clinica_utils.py b/tests/unittests/utils/test_clinica_utils.py
new file mode 100644
index 000000000..3c617d199
--- /dev/null
+++ b/tests/unittests/utils/test_clinica_utils.py
@@ -0,0 +1,30 @@
+import pytest
+
+
+@pytest.mark.parametrize(
+    "acq_label,suvr_reference_region,uncropped_image,expected_pattern",
+    [
+        (
+            "18FFDG",
+            "cerebellumPons2",
+            True,
+            "pet_linear/*_trc-18FFDG_space-MNI152NLin2009cSym_res-1x1x1_suvr-cerebellumPons2_pet.nii.gz",
+        ),
+        (
+            "18FAV45",
+            "pons",
+            False,
+            "pet_linear/*_trc-18FAV45_space-MNI152NLin2009cSym_desc-Crop_res-1x1x1_suvr-pons_pet.nii.gz",
+        ),
+    ],
+)
+def test_pet_linear_nii(
+    acq_label, suvr_reference_region, uncropped_image, expected_pattern
+):
+    from clinicadl.utils.clinica_utils import pet_linear_nii
+
+    assert pet_linear_nii(acq_label, suvr_reference_region, uncropped_image) == {
+        "description": "",
+        "needed_pipeline": "pet-linear",
+        "pattern": expected_pattern,
+    }