diff --git a/.github/workflows/ci-testing.yml b/.github/workflows/ci-testing.yml
index af9d08cc..8dafa022 100644
--- a/.github/workflows/ci-testing.yml
+++ b/.github/workflows/ci-testing.yml
@@ -62,14 +62,14 @@ jobs:
           pytest tests \
               --ignore=tests/processing \
               --ignore=tests/raw \
-              -n 2 --cov=litdata --durations=0 --timeout=120 --capture=no --verbose
+              -n 2 --cov=litdata --durations=0 --timeout=150 --capture=no --verbose
 
       - name: Run processing tests sequentially
         run: |
           # note that the listed test should match ignored in the previous step
           pytest \
             tests/processing tests/raw \
-            --cov=litdata --cov-append --durations=0 --timeout=120 --capture=no --verbose
+            --cov=litdata --cov-append --durations=0 --timeout=150 --capture=no --verbose
 
       - name: Statistics
         continue-on-error: true
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 725015af..8cdecce8 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -44,7 +44,7 @@ repos:
       - id: detect-private-key
 
   - repo: https://github.com/codespell-project/codespell
-    rev: v2.4.1
+    rev: v2.4.2
     hooks:
       - id: codespell
         additional_dependencies: [tomli]
@@ -55,14 +55,14 @@ repos:
         #args: ["--write-changes"] # uncomment if you want to get automatic fixing
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.14.10
+    rev: v0.15.9
     hooks:
       - id: ruff
         args: ["--fix"]
       - id: ruff-format
 
   - repo: https://github.com/executablebooks/mdformat
-    rev: 0.7.22
+    rev: 1.0.0
     hooks:
       - id: mdformat
         additional_dependencies:
@@ -76,8 +76,8 @@ repos:
               README.md
           )$
 
-  - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: v3.1.0
+  - repo: https://github.com/JoC0de/pre-commit-prettier
+    rev: v3.8.1
     hooks:
       - id: prettier
         files: \.(json|yml|yaml|toml)
@@ -85,11 +85,11 @@ repos:
         args: ["--print-width=120"]
 
   - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: v2.8.0
+    rev: v2.8.0 # pinned to avoid timeout issues in CI
     hooks:
       - id: pyproject-fmt
         additional_dependencies: [tox]
   - repo: https://github.com/abravalheri/validate-pyproject
-    rev: v0.24.1
+    rev: v0.25
     hooks:
       - id: validate-pyproject
diff --git a/tests/streaming/test_dataset.py b/tests/streaming/test_dataset.py
index 15a5babd..953c934b 100644
--- a/tests/streaming/test_dataset.py
+++ b/tests/streaming/test_dataset.py
@@ -544,7 +544,7 @@ def test_dataset_cache_recreation(tmpdir):
     assert dataset.shuffler is shuffler  # shuffler gets reused
 
 
-@pytest.mark.timeout(30)
+@pytest.mark.timeout(45)
 def test_len_called_before_dataloader_drop_last(tmpdir):
     cache = Cache(str(tmpdir), chunk_size=10)
     for i in range(100):
@@ -1535,16 +1535,15 @@ def test_dataset_with_mosaic_mds_data(tmpdir):
 
     dataset = StreamingDataset(input_dir=str(tmpdir))
     dataloader = DataLoader(dataset, batch_size=4, drop_last=True)
-    i = 0
-    for batch in dataloader:
+
+    for i, batch in enumerate(dataloader):
         assert len(batch["class"]) == 4
         assert len(batch["image"]) == 4
         assert list(batch["class"]) == [4 * i, 4 * i + 1, 4 * i + 2, 4 * i + 3]
-        i += 1
 
     dataloader = DataLoader(dataset, batch_size=4, drop_last=False)
-    i = 0
-    for batch in dataloader:
+
+    for i, batch in enumerate(dataloader):
         if i == 2:
             # last batch is smaller than batch_size
             assert len(batch["class"]) == 2
@@ -1554,7 +1553,6 @@ def test_dataset_with_mosaic_mds_data(tmpdir):
         assert len(batch["class"]) == 4
         assert len(batch["image"]) == 4
         assert list(batch["class"]) == [4 * i, 4 * i + 1, 4 * i + 2, 4 * i + 3]
-        i += 1
 
 
 @pytest.mark.parametrize("shuffle", [True, False])