diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index 9b0d32d..62e46d1 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -4,9 +4,11 @@ runs:
   using: "composite"
   steps:
     - name: Install pixi
-      uses: prefix-dev/setup-pixi@v0.8.11
+      uses: prefix-dev/setup-pixi@v0.9.1
       with:
         pixi-version: "v0.54.0"
         cache: false # The self-hosted runners have a local cache
         locked: true
         log-level: "v"
+        post-cleanup: true
+        pixi-bin-path: ${{ runner.temp }}/bin/pixi
diff --git a/changelog/51.improvement.md b/changelog/51.improvement.md
new file mode 100644
index 0000000..ba82152
--- /dev/null
+++ b/changelog/51.improvement.md
@@ -0,0 +1 @@
+Ensure that the required files for the PMP ENSO diagnostics are available
diff --git a/scripts/fetch_test_data.py b/scripts/fetch_test_data.py
index ba6883d..dc9b32f 100755
--- a/scripts/fetch_test_data.py
+++ b/scripts/fetch_test_data.py
@@ -508,6 +508,31 @@ def process_sample_data_request(
         remove_ensembles=False,
         time_span=("2000", "2025"),
     ),
+    # PMP ENSO data
+    CMIP6Request(
+        id="pmp-enso",
+        facets=dict(
+            source_id="ACCESS-ESM1-5",
+            frequency=["fx", "mon"],
+            variable_id=[
+                "areacella",
+                "sftlf",
+                "ts",
+                "tauu",
+                "taux",
+                "hfls",
+                "hfss",
+                "rlds",
+                "rlus",
+                "rsds",
+                "rsus",
+            ],
+            experiment_id=["historical"],
+            variant_label=["r1i1p1f1"],
+        ),
+        remove_ensembles=False,
+        time_span=("2000", "2025"),
+    ),
     # All unpublished obs4mips datasets
     Obs4REFRequest(),
 ]