diff --git a/docs/release_notes/next/dev-2444-ruff-implicit-namespace-package b/docs/release_notes/next/dev-2444-ruff-implicit-namespace-package
new file mode 100644
index 00000000000..092b2e162b3
--- /dev/null
+++ b/docs/release_notes/next/dev-2444-ruff-implicit-namespace-package
@@ -0,0 +1 @@
+#2444: Ruff rule to check for missing __init__.py files
diff --git a/environment-dev.yml b/environment-dev.yml
index f48da26dd12..5757bfb7676 100644
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -29,7 +29,7 @@ dependencies:
   - pyinstaller==6.9.*
   - pyright==1.1.*
   - make==4.3
-  - ruff=0.3.3
+  - ruff=0.3.7
   - pre-commit==3.5.*
   - sphinx==7.2.*
   - pydata-sphinx-theme==0.15.*
diff --git a/mantidimaging/gui/widgets/palette_changer/test/__init__.py b/mantidimaging/gui/widgets/palette_changer/test/__init__.py
new file mode 100644
index 00000000000..3bf970a700e
--- /dev/null
+++ b/mantidimaging/gui/widgets/palette_changer/test/__init__.py
@@ -0,0 +1,3 @@
+# Copyright (C) 2021 ISIS Rutherford Appleton Laboratory UKRI
+# SPDX - License - Identifier: GPL-3.0-or-later
+from __future__ import annotations
diff --git a/pyproject.toml b/pyproject.toml
index 1aadfe935ea..700500a24e6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,10 +3,13 @@ line-length = 120
 target-version = "py310"
 
 [tool.ruff.lint]
-select = ["F", "E", "W", "UP", "B", "C4", "FA", "NPY"]
+select = ["F", "E", "W", "UP", "B", "C4", "FA", "NPY", "INP"]
 fixable = ["UP"]
 ignore = ["UP014"]
 
+[tool.ruff.lint.per-file-ignores]
+"!mantidimaging/**.py" = ["INP"]
+
 [tool.pyright]
 typeCheckingMode = "basic"
 reportMissingImports = false