diff --git a/azure-pipelines/pipelines.yaml b/azure-pipelines/pipelines.yaml
index e145d07c..4a28e2a1 100644
--- a/azure-pipelines/pipelines.yaml
+++ b/azure-pipelines/pipelines.yaml
@@ -38,13 +38,9 @@ jobs:
       # See https://github.com/astral-sh/ruff and https://beta.ruff.rs/docs/
       - script: "python3 -m pip install -U ruff"
         displayName: "Install ruff"
-
-      # We just switched to a new linter and there are a ton of errors. We need time to go through them, but we don't want the block the build.
-      # Therefore, we use continueOnError to generate a warning while there are linter errors. The build will still run.
-      # To force the step to return zero even with linter errors, add "--exit-zero" after the "check" in the command line
+        
       - script: "python3 -m ruff check --format=junit --output-file=$(Build.ArtifactStagingDirectory)/lint-ruff.xml ."
         displayName: "Run ruff"
-        continueOnError: "true"
 
       - task: "PublishTestResults@2"
         displayName: "Publish linting results"
diff --git a/pyproject.toml b/pyproject.toml
index a6fc072f..cd5f2787 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,3 +22,55 @@ executionEnvironments = [
   { root = "src" }, { root = "." }
 ]
 
+[tool.ruff]
+# Enable the pycodestyle (`E`) and Pyflakes (`F`) rules by default.
+# Unlike Flake8, Ruff doesn't enable pycodestyle warnings (`W`) or
+# McCabe complexity (`C901`) by default.
+select = ["E", "F"]
+ignore = [
+    "E203", "E221", "E222", "E226", "E261", "E262", "E265", "E266",
+    "E401", "E402",
+    "E501",
+    "E722", "E731" 
+]
+
+# Allow autofix for all enabled rules (when `--fix`) is provided.
+fixable = ["ALL"]
+unfixable = []
+
+# Exclude a variety of commonly ignored directories.
+exclude = [
+    ".bzr",
+    ".direnv",
+    ".eggs",
+    ".git",
+    ".git-rewrite",
+    ".hg",
+    ".mypy_cache",
+    ".nox",
+    ".pants.d",
+    ".pytype",
+    ".ruff_cache",
+    ".svn",
+    ".tox",
+    ".venv",
+    "__pypackages__",
+    "_build",
+    "buck-out",
+    "build",
+    "dist",
+    "node_modules",
+    "venv",
+    "versioneer.py",
+    "src/debugpy/_vendored/pydevd"
+]
+per-file-ignores = {}
+
+# Same as Black.
+line-length = 88
+
+# Allow unused variables when underscore-prefixed.
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+# Assume Python 3.8
+target-version = "py38"
\ No newline at end of file
diff --git a/tests/debugpy/test_threads.py b/tests/debugpy/test_threads.py
index 9ba49f4d..8e44dbf4 100644
--- a/tests/debugpy/test_threads.py
+++ b/tests/debugpy/test_threads.py
@@ -19,7 +19,7 @@ def test_thread_count(pyfile, target, run, count):
         import sys
 
         debuggee.setup()
-        stop = False
+        stop = False # noqa: F841
 
         def worker(tid, offset):
             i = 0
@@ -35,7 +35,7 @@ def test_thread_count(pyfile, target, run, count):
                 threads.append(thread)
                 thread.start()
         print("check here")  # @bp
-        stop = True
+        stop = True  # noqa: F841
 
     with debug.Session() as session:
         with run(session, target(code_to_debug, args=[str(count)])):