diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 825b299..ee647d0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -20,9 +20,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
-      - name: Install pytest
-        run: pip install pytest
-      - name: Install PyVMCON
-        run: pip install .
+      - name: Install PyVMCON with testing dependencies (pytest)
+        run: pip install '.[test]'
       - name: Run pytest
         run: pytest tests/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c161d48..5e8c029 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,12 +1,12 @@
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.3.0
+    rev: v6.0.0
     hooks:
       - id: check-yaml
       - id: end-of-file-fixer
       - id: trailing-whitespace
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.15.4
+    rev: v0.15.13
     hooks:
       - id: ruff-check
         args: [--fix]
diff --git a/README.md b/README.md
index 449b563..6fc9625 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ pip install .
 Documentation for the VMCON algorithm and PyVMCON API/use can be found on our [**GitHub pages**](https://ukaea.github.io/PyVMCON/). The documentation includes references to the VMCON paper and other helpful resources.
 
 ## Testing
-Tests can be run using `pytest tests/`. The tests check the paper examples are replicated.
+Tests can be run by installing the optional test dependencies `pip install 'PyVMCON[test]'` and then running `pytest tests/`. The tests check the examples from the original VMCON paper are replicated.
 
 ## License
 PyVMCON is provided under the MIT license, please see the LICENSE file for full details.
diff --git a/pyproject.toml b/pyproject.toml
index f3cb275..c4e512d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,7 @@ Documentation = "https://ukaea.github.io/PyVMCON/"
 Source = "https://github.com/ukaea/PyVMCON"
 
 [project.optional-dependencies]
+test = ["pytest"]
 docs = [
     "Sphinx>=6.1",
     "sphinxcontrib-mermaid>=0.9",
@@ -56,3 +57,6 @@ ignore = [
 [tool.ruff.lint.per-file-ignores]
 "*.ipynb" = ["T201", "S311", "ANN", "D103"]
 "tests/*" = ["INP001", "ANN", "D103", "S101", "SLF001", "PLR0915", "PLR2004"]
+
+[tool.ruff.format]
+preview = true
diff --git a/tests/test_vmcon.py b/tests/test_vmcon.py
index aaaf13f..3557502 100644
--- a/tests/test_vmcon.py
+++ b/tests/test_vmcon.py
@@ -25,28 +25,22 @@ class BRevisionAsset:
             B=np.identity(2),
             ksi=np.array([-0.66666666666666663, -0.83333333333333348]),
             eta=np.array([-1.3425925925925923, -1.7129629629629632]),
-            expected_return=np.array(
-                [
-                    [1.3858727457706470, 0.50241291449459347],
-                    [0.50241291449459347, 1.6536252239598812],
-                ]
-            ),
+            expected_return=np.array([
+                [1.3858727457706470, 0.50241291449459347],
+                [0.50241291449459347, 1.6536252239598812],
+            ]),
         ),
         BRevisionAsset(
-            B=np.array(
-                [
-                    [2.1875467668036239, 1.4714414127452644],
-                    [1.4714414127452644, 2.7501870672148332],
-                ]
-            ),
+            B=np.array([
+                [2.1875467668036239, 1.4714414127452644],
+                [1.4714414127452644, 2.7501870672148332],
+            ]),
             ksi=np.array([-1.2385140125071988e-6, -6.1925700625482853e-7]),
             eta=np.array([-3.6205427119684330e-6, -3.5255433852299234e-6]),
-            expected_return=np.array(
-                [
-                    [2.1875592084316073, 1.4714730232083293],
-                    [1.4714730232083293, 2.7502368318126678],
-                ]
-            ),
+            expected_return=np.array([
+                [2.1875592084316073, 1.4714730232083293],
+                [1.4714730232083293, 2.7502368318126678],
+            ]),
         ),
     ],
 )
@@ -75,17 +69,16 @@ def test_revise_B(test_asset):
             expected_return=np.array([-1.3425925925925923, -1.7129629629629632]),
         ),
         BRevisionAsset(
-            B=np.array(
-                [
-                    [2.1875467668036239, 1.4714414127452644],
-                    [1.4714414127452644, 2.7501870672148332],
-                ]
-            ),
+            B=np.array([
+                [2.1875467668036239, 1.4714414127452644],
+                [1.4714414127452644, 2.7501870672148332],
+            ]),
             ksi=np.array([-1.2385140125071988e-6, -6.1925700625482853e-7]),
             eta=np.array([-3.6205427119684330e-6, -3.5255433852299234e-6]),
-            expected_return=np.array(
-                [-3.6205427119684330e-006, -3.5255433852299234e-006]
-            ),
+            expected_return=np.array([
+                -3.6205427119684330e-006,
+                -3.5255433852299234e-006,
+            ]),
         ),
     ],
 )