diff --git a/.gitignore b/.gitignore
index f2582958..1fe6322b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -160,4 +160,3 @@ devenv.local.nix
 
 # pre-commit
 .pre-commit-config.yaml
-
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index b40b54ec..62dd3eaa 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,63 +1,65 @@
 repos:
--   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.5.0  # Use the ref you want to point at
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0 # Use the ref you want to point at
     hooks:
-    -   id: check-added-large-files
-    -   id: check-case-conflict
-    -   id: check-executables-have-shebangs
-    -   id: check-merge-conflict
-    -   id: check-toml
-    -   id: check-vcs-permalinks
-    -   id: check-yaml
-    -   id: detect-private-key
-    -   id: end-of-file-fixer
-    -   id: fix-byte-order-marker
-    -   id: mixed-line-ending
-    # -   id: trailing-whitespace
-    # Python-specific
-    - id: check-ast
-    - id: check-docstring-first
-    - id: debug-statements
+      - id: check-added-large-files
+      - id: check-case-conflict
+      - id: check-executables-have-shebangs
+      - id: check-merge-conflict
+      - id: check-toml
+      - id: check-vcs-permalinks
+      - id: check-yaml
+      - id: detect-private-key
+      # - id: end-of-file-fixer
+      # - id: trailing-whitespace
+      - id: fix-byte-order-marker
+      - id: mixed-line-ending
+      # Python-specific
+      - id: check-ast
+      - id: check-docstring-first
+      - id: debug-statements
 
--   repo: https://github.com/crate-ci/typos
-    rev: v1.16.23
+  - repo: https://github.com/crate-ci/typos
+    rev: v1.17.1
     hooks:
-    -   id: typos
-        args: []
+      - id: typos
 
--   repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.1.7
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.1.13
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
       - id: ruff-format
 
--   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: 'v1.3.0'
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: "v1.8.0"
     hooks:
-    - id: mypy
-      pass_filenames: false
-      args: [--package=guppy]
-      additional_dependencies: [
-        ormsgpack,
-        pydantic,
-      ]
+      - id: mypy
+        pass_filenames: false
+        args: [--package=guppylang]
+        additional_dependencies: [
+          graphviz,
+          networkx,
+          ormsgpack,
+          pydantic,
+          pytket,
+          ]
 
--   repo: local
+  - repo: local
     hooks:
-    -   id: cargo-check
+      - id: cargo-check
         name: Cargo check
         entry: bash -c 'cd validator && exec cargo check'
         pass_filenames: false
         types: [file, rust]
         language: system
-    -   id: rust-linting
+      - id: rust-linting
         name: Rust linting
         entry: bash -c 'cd validator && exec cargo fmt --all --'
         pass_filenames: true
         types: [file, rust]
         language: system
-    -   id: rust-clippy
+      - id: rust-clippy
         name: Rust clippy
         entry: bash -c 'cd validator && exec cargo clippy --all-targets --all-features -- -Dclippy::all'
         pass_filenames: false
diff --git a/devenv.yaml b/devenv.yaml
index 87a8faa4..62b57224 100644
--- a/devenv.yaml
+++ b/devenv.yaml
@@ -5,4 +5,4 @@ inputs:
     url: github:nix-community/fenix
     inputs:
       nixpkgs:
-        follows: nixpkgs
\ No newline at end of file
+        follows: nixpkgs
diff --git a/tests/error/test_py_errors.py b/tests/error/test_py_errors.py
index 84b4cb60..6bcc57e4 100644
--- a/tests/error/test_py_errors.py
+++ b/tests/error/test_py_errors.py
@@ -1,15 +1,12 @@
+from importlib.util import find_spec
+
 import pathlib
 import pytest
 
 from tests.error.util import run_error_test
 
 
-try:
-    import tket2
-
-    tket2_installed = True
-except ImportError:
-    tket2_installed = False
+tket2_installed = find_spec("tket2") is not None
 
 
 path = pathlib.Path(__file__).parent.resolve() / "py_errors"
diff --git a/tests/integration/test_py.py b/tests/integration/test_py.py
index 93dbf299..1908d85e 100644
--- a/tests/integration/test_py.py
+++ b/tests/integration/test_py.py
@@ -1,3 +1,5 @@
+from importlib.util import find_spec
+
 import pytest
 
 from guppylang.decorator import guppy
@@ -6,13 +8,7 @@
 from tests.integration.util import py
 from tests.util import compile_guppy
 
-
-try:
-    import tket2
-
-    tket2_installed = True
-except ImportError:
-    tket2_installed = False
+tket2_installed = find_spec("tket2") is not None
 
 
 def test_basic(validate):
@@ -107,7 +103,7 @@ def test_pytket_multi_qubit(validate):
     module.load(quantum)
 
     @guppy(module)
-    def foo(q1: Qubit, q2:Qubit, q3:Qubit) -> tuple[Qubit, Qubit, Qubit]:
+    def foo(q1: Qubit, q2: Qubit, q3: Qubit) -> tuple[Qubit, Qubit, Qubit]:
         return py(circ)(q1, q2, q3)
 
     validate(module.compile())