diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
index a4d5678d..18c61df2 100644
--- a/.github/workflows/default.yml
+++ b/.github/workflows/default.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     # Standard drop-in approach that should work for most people.
     - uses: ammaraskar/sphinx-action@master
       with:
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index fb901427..787c3522 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -11,7 +11,7 @@ jobs:
     name: pre-commit hooks
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.1.0
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: '3.9'
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 243110c1..7fb93348 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -6,7 +6,7 @@ jobs:
   docs:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: ammaraskar/sphinx-action@master
       with:
         docs-folder: "docs/"
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1218c80c..80c3286c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,9 +11,9 @@ jobs:
         python-version: [38, 39, 310]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup conda
-        uses: mamba-org/provision-with-micromamba@main
+        uses: mamba-org/setup-micromamba@v1
         with:
           environment-file: ci/environment-py${{matrix.python-version}}.yml
       - name: Install kerchunk
diff --git a/kerchunk/tests/test_grib.py b/kerchunk/tests/test_grib.py
index b88d8536..cd5bf9c9 100644
--- a/kerchunk/tests/test_grib.py
+++ b/kerchunk/tests/test_grib.py
@@ -41,7 +41,7 @@ def _fetch_first(url):
 @pytest.mark.parametrize(
     "url",
     [
-        "s3://noaa-hrrr-bdp-pds/hrrr.20140730/conus/hrrr.t23z.wrfsubhf1430.grib2",
+        "s3://noaa-hrrr-bdp-pds/hrrr.20140730/conus/hrrr.t23z.wrfsubhf08.grib2",
         "s3://noaa-gefs-pds/gefs.20221011/00/atmos/pgrb2ap5/gep01.t00z.pgrb2a.0p50.f570",
     ],
 )