diff --git a/packages/cmk-agent-based/BUILD b/packages/cmk-agent-based/BUILD
index 51835e84b47..38c737906f4 100644
--- a/packages/cmk-agent-based/BUILD
+++ b/packages/cmk-agent-based/BUILD
@@ -53,7 +53,9 @@ py_doc_test(
 
 py_pytest_main(
     name = "__test__",
-    tags = ["no-mypy"],
+    deps = [
+        requirement("pytest"),
+    ],
 )
 
 py_test(
@@ -62,7 +64,7 @@ py_test(
     srcs = glob(["tests/**/*.py"]) + [":__test__.py"],
     args = ["--config-file=$(location pyproject.toml)"],
     data = ["pyproject.toml"],
-    main = ":__test__.py",
+    main = "__test__.py",
     deps = [
         ":__test__",
         ":cmk-agent-based",
diff --git a/packages/cmk-agent-based/run b/packages/cmk-agent-based/run
index 26fadad2b3f..eca8f204496 100755
--- a/packages/cmk-agent-based/run
+++ b/packages/cmk-agent-based/run
@@ -8,8 +8,6 @@ set -e
 JOBS=6
 readonly BAZEL_CMD=${BAZEL_CMD:-bazel}
 readonly ALL_LINTERS=mypy,ruff,bandit
-REPO_PATH="$(git rev-parse --show-toplevel)"
-readonly REPO_PATH
 
 failure() {
     test ${#@} -eq 0 || echo "$(basename "$0"):" "$@" >&2
@@ -118,7 +116,7 @@ setup_venv() {
     # Further: uv seems to fall back to clang, see https://github.com/astral-sh/uv/issues/8036
     CC="gcc" ${BAZEL_CMD} run //:create_venv
     # shellcheck source=/dev/null
-    source "${REPO_PATH}"/.venv_uv/bin/activate
+    source "$("$BAZEL_CMD" info workspace)"/.venv_uv/bin/activate
     SETUP_VENV_RAN=yes
 }
 
@@ -128,14 +126,14 @@ run_clean() {
 }
 
 run_unit_tests() {
-    "${BAZEL_CMD}" test //packages/cmk-agent-based:all
+    "${BAZEL_CMD}" test "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_check_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format --check --diff pyproject.toml
     "${BAZEL_CMD}" lint \
         --aspect:interactive=false \
-        --aspect:config=../../.aspect/cli/config_isort.yaml \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
         --diff \
         --machine \
         :all
@@ -143,7 +141,7 @@ run_check_format() {
 }
 
 run_mypy() {
-    "${BAZEL_CMD}" build --config=mypy //packages/cmk-agent-based:all
+    "${BAZEL_CMD}" build --config=mypy "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_ruff() {
@@ -162,7 +160,7 @@ run_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format pyproject.toml
     "${BAZEL_CMD}" lint \
         --aspect:interactive=false \
-        --aspect:config="${REPO_PATH}"/.aspect/cli/config_isort.yaml \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
         --fix \
         :all
     "${BAZEL_CMD}" run :format "$(realpath cmk)" "$(realpath tests)"
diff --git a/packages/cmk-ccc/run b/packages/cmk-ccc/run
index c504b817d96..eca8f204496 100755
--- a/packages/cmk-ccc/run
+++ b/packages/cmk-ccc/run
@@ -126,7 +126,7 @@ run_clean() {
 }
 
 run_unit_tests() {
-    "${BAZEL_CMD}" test //packages/cmk-ccc:all
+    "${BAZEL_CMD}" test "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_check_format() {
@@ -141,7 +141,7 @@ run_check_format() {
 }
 
 run_mypy() {
-    "${BAZEL_CMD}" build --config=mypy //packages/cmk-ccc:all
+    "${BAZEL_CMD}" build --config=mypy "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_ruff() {
diff --git a/packages/cmk-crypto/BUILD b/packages/cmk-crypto/BUILD
index d11eca35129..d6978004378 100644
--- a/packages/cmk-crypto/BUILD
+++ b/packages/cmk-crypto/BUILD
@@ -2,6 +2,7 @@ load("@aspect_rules_lint//format:defs.bzl", "format_multirun")
 load("@aspect_rules_py//py:defs.bzl", "py_library", "py_pytest_main", "py_test")
 load("@cmk_requirements//:requirements.bzl", "requirement")
 load("@rules_python//python:packaging.bzl", "py_wheel")
+load("//bazel/rules:doctest.bzl", "py_doc_test")
 load("//bazel/rules:package_wheel.bzl", "package_wheel")
 
 exports_files([
@@ -33,6 +34,13 @@ py_library(
     ],
 )
 
+py_doc_test(
+    name = "doctest",
+    size = "small",
+    srcs = ["cmk-crypto"],
+    tags = ["no-mypy"],
+)
+
 py_pytest_main(
     name = "__test__",
     deps = [
@@ -65,9 +73,7 @@ py_wheel(
     strip_path_prefixes = ["packages/cmk-crypto"],
     # TODO: Duplicated from pyproject.toml
     version = "0.9.0",
-    deps = [
-        ":cmk-crypto",
-    ],
+    deps = [":cmk-crypto"],
 )
 
 package_wheel(
diff --git a/packages/cmk-crypto/run b/packages/cmk-crypto/run
index 9e558b22b47..eca8f204496 100755
--- a/packages/cmk-crypto/run
+++ b/packages/cmk-crypto/run
@@ -116,7 +116,7 @@ setup_venv() {
     # Further: uv seems to fall back to clang, see https://github.com/astral-sh/uv/issues/8036
     CC="gcc" ${BAZEL_CMD} run //:create_venv
     # shellcheck source=/dev/null
-    source "$(bazel info workspace)"/.venv_uv/bin/activate
+    source "$("$BAZEL_CMD" info workspace)"/.venv_uv/bin/activate
     SETUP_VENV_RAN=yes
 }
 
@@ -126,18 +126,22 @@ run_clean() {
 }
 
 run_unit_tests() {
-    "${BAZEL_CMD}" test //packages/cmk-crypto:all
+    "${BAZEL_CMD}" test "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_check_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format --check --diff pyproject.toml
-    setup_venv
-    ruff check --select I --diff cmk tests
-    ruff format --check --diff cmk tests
+    "${BAZEL_CMD}" lint \
+        --aspect:interactive=false \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
+        --diff \
+        --machine \
+        :all
+    "${BAZEL_CMD}" run :format.check "$(realpath cmk)" "$(realpath tests)"
 }
 
 run_mypy() {
-    "${BAZEL_CMD}" build --config=mypy //packages/cmk-crypto:all
+    "${BAZEL_CMD}" build --config=mypy "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_ruff() {
diff --git a/packages/cmk-graphing/BUILD b/packages/cmk-graphing/BUILD
index 7cca5a79922..4e18df62bc3 100644
--- a/packages/cmk-graphing/BUILD
+++ b/packages/cmk-graphing/BUILD
@@ -1,5 +1,8 @@
-load("@aspect_rules_py//py:defs.bzl", "py_library")
+load("@aspect_rules_lint//format:defs.bzl", "format_multirun")
+load("@aspect_rules_py//py:defs.bzl", "py_library", "py_pytest_main", "py_test")
+load("@cmk_requirements//:requirements.bzl", "requirement")
 load("@rules_python//python:packaging.bzl", "py_wheel")
+load("//bazel/rules:doctest.bzl", "py_doc_test")
 load("//bazel/rules:package_wheel.bzl", "package_wheel")
 
 exports_files([
@@ -23,15 +26,44 @@ py_library(
     visibility = ["//cmk:__pkg__"],
 )
 
+py_doc_test(
+    name = "doctest",
+    size = "small",
+    srcs = ["cmk-graphing"],
+    tags = ["no-mypy"],
+)
+
+py_pytest_main(
+    name = "__test__",
+    deps = [
+        requirement("pytest"),
+    ],
+)
+
+py_test(
+    name = "unit",
+    size = "small",
+    srcs = glob(["tests/**/*.py"]) + [":__test__.py"],
+    main = "__test__.py",
+    deps = [
+        ":__test__",
+        ":cmk-graphing",
+        requirement("pytest"),
+    ],
+)
+
+format_multirun(
+    name = "format",
+    python = "@aspect_rules_lint//format:ruff",
+)
+
 py_wheel(
     name = "wheel",
     distribution = "cmk-graphing",
     strip_path_prefixes = ["packages/cmk-graphing"],
     # TODO: Duplicated from pyproject.toml
     version = "1.0.0",
-    deps = [
-        ":cmk-graphing",
-    ],
+    deps = [":cmk-graphing"],
 )
 
 package_wheel(
diff --git a/packages/cmk-graphing/run b/packages/cmk-graphing/run
index c5d866aae30..eca8f204496 100755
--- a/packages/cmk-graphing/run
+++ b/packages/cmk-graphing/run
@@ -7,7 +7,7 @@ set -e
 
 JOBS=6
 readonly BAZEL_CMD=${BAZEL_CMD:-bazel}
-readonly ALL_LINTERS=mypy,pylint,bandit
+readonly ALL_LINTERS=mypy,ruff,bandit
 
 failure() {
     test ${#@} -eq 0 || echo "$(basename "$0"):" "$@" >&2
@@ -35,7 +35,7 @@ parse_options() {
     RUN_UNIT_TESTS=no
     RUN_CHECK_FORMAT=no
     RUN_MYPY=no
-    RUN_PYLINT=no
+    RUN_RUFF=no
     RUN_BANDIT=no
     RUN_FORMAT=no
     RUN_DOCUMENTATION=no
@@ -78,7 +78,7 @@ parse_options() {
                 RUN_UNIT_TESTS=yes
                 RUN_CHECK_FORMAT=yes
                 RUN_MYPY=yes
-                RUN_PYLINT=yes
+                RUN_RUFF=yes
                 RUN_BANDIT=yes
                 shift
                 ;;
@@ -107,7 +107,7 @@ parse_options() {
         esac
     done
 
-    readonly RUN_CLEAN RUN_UNIT_TESTS RUN_CHECK_FORMAT RUN_MYPY RUN_PYLINT RUN_BANDIT RUN_FORMAT RUN_DOCUMENTATION JOBS
+    readonly RUN_CLEAN RUN_UNIT_TESTS RUN_CHECK_FORMAT RUN_MYPY RUN_RUFF RUN_BANDIT RUN_FORMAT RUN_DOCUMENTATION JOBS
 }
 
 setup_venv() {
@@ -116,7 +116,7 @@ setup_venv() {
     # Further: uv seems to fall back to clang, see https://github.com/astral-sh/uv/issues/8036
     CC="gcc" ${BAZEL_CMD} run //:create_venv
     # shellcheck source=/dev/null
-    source "$(bazel info workspace)"/.venv_uv/bin/activate
+    source "$("$BAZEL_CMD" info workspace)"/.venv_uv/bin/activate
     SETUP_VENV_RAN=yes
 }
 
@@ -126,24 +126,26 @@ run_clean() {
 }
 
 run_unit_tests() {
-    setup_venv
-    pytest
+    "${BAZEL_CMD}" test "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_check_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format --check --diff pyproject.toml
-    setup_venv
-    ruff check --select I --diff cmk tests
-    ruff format --check --diff cmk tests
+    "${BAZEL_CMD}" lint \
+        --aspect:interactive=false \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
+        --diff \
+        --machine \
+        :all
+    "${BAZEL_CMD}" run :format.check "$(realpath cmk)" "$(realpath tests)"
 }
 
 run_mypy() {
-    "${BAZEL_CMD}" build --config=mypy //packages/cmk-graphing:all
+    "${BAZEL_CMD}" build --config=mypy "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
-run_pylint() {
-    setup_venv
-    PYTHONPATH=. pylint --jobs="${JOBS}" cmk tests
+run_ruff() {
+    "${BAZEL_CMD}" lint :all
 }
 
 run_bandit() {
@@ -156,9 +158,12 @@ run_bandit() {
 
 run_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format pyproject.toml
-    setup_venv
-    ruff check --select I --fix cmk tests
-    ruff format cmk tests
+    "${BAZEL_CMD}" lint \
+        --aspect:interactive=false \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
+        --fix \
+        :all
+    "${BAZEL_CMD}" run :format "$(realpath cmk)" "$(realpath tests)"
 }
 
 run_documentation() {
@@ -174,7 +179,7 @@ main() {
     test ${RUN_UNIT_TESTS} = yes && run_unit_tests
     test ${RUN_CHECK_FORMAT} = yes && run_check_format
     test ${RUN_MYPY} = yes && run_mypy
-    test ${RUN_PYLINT} = yes && run_pylint
+    test ${RUN_RUFF} = yes && run_ruff
     test ${RUN_BANDIT} = yes && run_bandit
     test ${RUN_DOCUMENTATION} = yes && run_documentation
     test ${RUN_FORMAT} = yes && run_format
diff --git a/packages/cmk-server-side-calls/BUILD b/packages/cmk-server-side-calls/BUILD
index 16f08fb3009..4bffd0d2a46 100644
--- a/packages/cmk-server-side-calls/BUILD
+++ b/packages/cmk-server-side-calls/BUILD
@@ -1,5 +1,8 @@
-load("@aspect_rules_py//py:defs.bzl", "py_library")
+load("@aspect_rules_lint//format:defs.bzl", "format_multirun")
+load("@aspect_rules_py//py:defs.bzl", "py_library", "py_pytest_main", "py_test")
+load("@cmk_requirements//:requirements.bzl", "requirement")
 load("@rules_python//python:packaging.bzl", "py_wheel")
+load("//bazel/rules:doctest.bzl", "py_doc_test")
 load("//bazel/rules:package_wheel.bzl", "package_wheel")
 
 exports_files([
@@ -20,15 +23,47 @@ py_library(
     visibility = ["//cmk:__pkg__"],
 )
 
+py_doc_test(
+    name = "doctest",
+    size = "small",
+    srcs = ["cmk-server-side-calls"],
+    tags = ["no-mypy"],
+    # TODO: There should be *no* imports in doctests!
+    deps = [requirement("pydantic")],
+)
+
+py_pytest_main(
+    name = "__test__",
+    deps = [
+        requirement("pytest"),
+    ],
+)
+
+py_test(
+    name = "unit",
+    size = "small",
+    srcs = glob(["tests/**/*.py"]) + [":__test__.py"],
+    main = "__test__.py",
+    deps = [
+        ":__test__",
+        ":cmk-server-side-calls",
+        requirement("pydantic"),
+        requirement("pytest"),
+    ],
+)
+
+format_multirun(
+    name = "format",
+    python = "@aspect_rules_lint//format:ruff",
+)
+
 py_wheel(
     name = "wheel",
     distribution = "cmk-server-side-calls",
     strip_path_prefixes = ["packages/cmk-server-side-calls"],
     # TODO: Duplicated from pyproject.toml
     version = "1.0.0",
-    deps = [
-        ":cmk-server-side-calls",
-    ],
+    deps = [":cmk-server-side-calls"],
 )
 
 package_wheel(
diff --git a/packages/cmk-server-side-calls/run b/packages/cmk-server-side-calls/run
index 3b902000b31..eca8f204496 100755
--- a/packages/cmk-server-side-calls/run
+++ b/packages/cmk-server-side-calls/run
@@ -7,7 +7,7 @@ set -e
 
 JOBS=6
 readonly BAZEL_CMD=${BAZEL_CMD:-bazel}
-readonly ALL_LINTERS=mypy,pylint,bandit
+readonly ALL_LINTERS=mypy,ruff,bandit
 
 failure() {
     test ${#@} -eq 0 || echo "$(basename "$0"):" "$@" >&2
@@ -35,7 +35,7 @@ parse_options() {
     RUN_UNIT_TESTS=no
     RUN_CHECK_FORMAT=no
     RUN_MYPY=no
-    RUN_PYLINT=no
+    RUN_RUFF=no
     RUN_BANDIT=no
     RUN_FORMAT=no
     RUN_DOCUMENTATION=no
@@ -78,7 +78,7 @@ parse_options() {
                 RUN_UNIT_TESTS=yes
                 RUN_CHECK_FORMAT=yes
                 RUN_MYPY=yes
-                RUN_PYLINT=yes
+                RUN_RUFF=yes
                 RUN_BANDIT=yes
                 shift
                 ;;
@@ -107,7 +107,7 @@ parse_options() {
         esac
     done
 
-    readonly RUN_CLEAN RUN_UNIT_TESTS RUN_CHECK_FORMAT RUN_MYPY RUN_PYLINT RUN_BANDIT RUN_FORMAT RUN_DOCUMENTATION JOBS
+    readonly RUN_CLEAN RUN_UNIT_TESTS RUN_CHECK_FORMAT RUN_MYPY RUN_RUFF RUN_BANDIT RUN_FORMAT RUN_DOCUMENTATION JOBS
 }
 
 setup_venv() {
@@ -116,7 +116,7 @@ setup_venv() {
     # Further: uv seems to fall back to clang, see https://github.com/astral-sh/uv/issues/8036
     CC="gcc" ${BAZEL_CMD} run //:create_venv
     # shellcheck source=/dev/null
-    source "$(bazel info workspace)"/.venv_uv/bin/activate
+    source "$("$BAZEL_CMD" info workspace)"/.venv_uv/bin/activate
     SETUP_VENV_RAN=yes
 }
 
@@ -126,24 +126,26 @@ run_clean() {
 }
 
 run_unit_tests() {
-    setup_venv
-    pytest
+    "${BAZEL_CMD}" test "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_check_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format --check --diff pyproject.toml
-    setup_venv
-    ruff check --select I --diff cmk tests
-    ruff format --check --diff cmk tests
+    "${BAZEL_CMD}" lint \
+        --aspect:interactive=false \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
+        --diff \
+        --machine \
+        :all
+    "${BAZEL_CMD}" run :format.check "$(realpath cmk)" "$(realpath tests)"
 }
 
 run_mypy() {
-    "${BAZEL_CMD}" build --config=mypy //packages/cmk-server-side-calls:all
+    "${BAZEL_CMD}" build --config=mypy "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
-run_pylint() {
-    setup_venv
-    PYTHONPATH=. pylint --jobs="${JOBS}" cmk tests
+run_ruff() {
+    "${BAZEL_CMD}" lint :all
 }
 
 run_bandit() {
@@ -156,9 +158,12 @@ run_bandit() {
 
 run_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format pyproject.toml
-    setup_venv
-    ruff check --select I --fix cmk tests
-    ruff format cmk tests
+    "${BAZEL_CMD}" lint \
+        --aspect:interactive=false \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
+        --fix \
+        :all
+    "${BAZEL_CMD}" run :format "$(realpath cmk)" "$(realpath tests)"
 }
 
 run_documentation() {
@@ -174,7 +179,7 @@ main() {
     test ${RUN_UNIT_TESTS} = yes && run_unit_tests
     test ${RUN_CHECK_FORMAT} = yes && run_check_format
     test ${RUN_MYPY} = yes && run_mypy
-    test ${RUN_PYLINT} = yes && run_pylint
+    test ${RUN_RUFF} = yes && run_ruff
     test ${RUN_BANDIT} = yes && run_bandit
     test ${RUN_DOCUMENTATION} = yes && run_documentation
     test ${RUN_FORMAT} = yes && run_format
diff --git a/packages/cmk-trace/BUILD b/packages/cmk-trace/BUILD
index 8a9e137dfca..b90dc863b51 100644
--- a/packages/cmk-trace/BUILD
+++ b/packages/cmk-trace/BUILD
@@ -1,6 +1,8 @@
-load("@aspect_rules_py//py:defs.bzl", "py_library")
+load("@aspect_rules_lint//format:defs.bzl", "format_multirun")
+load("@aspect_rules_py//py:defs.bzl", "py_library", "py_pytest_main", "py_test")
 load("@cmk_requirements//:requirements.bzl", "requirement")
 load("@rules_python//python:packaging.bzl", "py_wheel")
+load("//bazel/rules:doctest.bzl", "py_doc_test")
 load("//bazel/rules:package_wheel.bzl", "package_wheel")
 
 exports_files([
@@ -16,7 +18,6 @@ py_library(
         "cmk/trace/_propagate.py",
         "cmk/trace/export.py",
         "cmk/trace/logs.py",
-        "cmk/trace/py.typed",
     ],
     imports = ["."],
     visibility = ["//visibility:public"],
@@ -29,15 +30,49 @@ py_library(
     ],
 )
 
+py_doc_test(
+    name = "doctest",
+    size = "small",
+    srcs = ["cmk-trace"],
+    tags = ["no-mypy"],
+)
+
+py_pytest_main(
+    name = "__test__",
+    deps = [
+        requirement("pytest"),
+    ],
+)
+
+py_test(
+    name = "unit",
+    size = "small",
+    srcs = glob(["tests/**/*.py"]) + [":__test__.py"],
+    main = "__test__.py",
+    deps = [
+        ":__test__",
+        ":cmk-trace",
+        requirement("opentelemetry-api"),
+        requirement("opentelemetry-sdk"),
+        requirement("opentelemetry-exporter-otlp"),
+        requirement("opentelemetry-exporter-otlp-proto-grpc"),
+        requirement("opentelemetry-semantic-conventions"),
+        requirement("pytest"),
+    ],
+)
+
+format_multirun(
+    name = "format",
+    python = "@aspect_rules_lint//format:ruff",
+)
+
 py_wheel(
     name = "wheel",
     distribution = "cmk-trace",
     strip_path_prefixes = ["packages/cmk-trace"],
     # TODO: Duplicated from pyproject.toml
     version = "1.0.0",
-    deps = [
-        ":cmk-trace",
-    ],
+    deps = [":cmk-trace"],
 )
 
 package_wheel(
diff --git a/packages/cmk-trace/cmk/trace/_config.py b/packages/cmk-trace/cmk/trace/_config.py
index 8563104b907..d42101a2347 100644
--- a/packages/cmk-trace/cmk/trace/_config.py
+++ b/packages/cmk-trace/cmk/trace/_config.py
@@ -19,6 +19,12 @@ class TraceSendConfig:
 
 
 def service_namespace_from_config(default_namespace: str, config: Mapping[str, str]) -> str:
+    """
+    >>> service_namespace_from_config("harry", {})
+    'harry'
+    >>> service_namespace_from_config("harry", {"CONFIG_TRACE_SERVICE_NAMESPACE": "hirsch"})
+    'hirsch'
+    """
     if namespace := config.get("CONFIG_TRACE_SERVICE_NAMESPACE"):
         return namespace
     return default_namespace
diff --git a/packages/cmk-trace/run b/packages/cmk-trace/run
index aa148da882a..eca8f204496 100755
--- a/packages/cmk-trace/run
+++ b/packages/cmk-trace/run
@@ -116,7 +116,7 @@ setup_venv() {
     # Further: uv seems to fall back to clang, see https://github.com/astral-sh/uv/issues/8036
     CC="gcc" ${BAZEL_CMD} run //:create_venv
     # shellcheck source=/dev/null
-    source "$(bazel info workspace)"/.venv_uv/bin/activate
+    source "$("$BAZEL_CMD" info workspace)"/.venv_uv/bin/activate
     SETUP_VENV_RAN=yes
 }
 
@@ -126,24 +126,26 @@ run_clean() {
 }
 
 run_unit_tests() {
-    setup_venv
-    pytest
+    "${BAZEL_CMD}" test "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_check_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format --check --diff pyproject.toml
-    setup_venv
-    ruff check --select I --diff cmk tests
-    ruff format --check --diff cmk tests
+    "${BAZEL_CMD}" lint \
+        --aspect:interactive=false \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
+        --diff \
+        --machine \
+        :all
+    "${BAZEL_CMD}" run :format.check "$(realpath cmk)" "$(realpath tests)"
 }
 
 run_mypy() {
-    "${BAZEL_CMD}" build --config=mypy //packages/cmk-trace:all
+    "${BAZEL_CMD}" build --config=mypy "/${PWD#"$("${BAZEL_CMD}" info workspace)"}:all"
 }
 
 run_ruff() {
-    setup_venv
-    ruff check cmk tests
+    "${BAZEL_CMD}" lint :all
 }
 
 run_bandit() {
@@ -156,9 +158,12 @@ run_bandit() {
 
 run_format() {
     command -v taplo >/dev/null && RUST_LOG=warn taplo format pyproject.toml
-    setup_venv
-    ruff check --select I --fix cmk tests
-    ruff format cmk tests
+    "${BAZEL_CMD}" lint \
+        --aspect:interactive=false \
+        --aspect:config="$("$BAZEL_CMD" info workspace)"/.aspect/cli/config_isort.yaml \
+        --fix \
+        :all
+    "${BAZEL_CMD}" run :format "$(realpath cmk)" "$(realpath tests)"
 }
 
 run_documentation() {
diff --git a/packages/cmk-trace/tests/conftest.py b/packages/cmk-trace/tests/conftest.py
index eec90b7371a..a80aa92bf08 100644
--- a/packages/cmk-trace/tests/conftest.py
+++ b/packages/cmk-trace/tests/conftest.py
@@ -11,10 +11,9 @@
 
 @pytest.fixture(name="reset_global_tracer_provider")
 def _fixture_reset_global_tracer_provider() -> Iterator[None]:
-    # pylint: disable=protected-access
-    provider_orig = otel_trace._TRACER_PROVIDER
+    provider_orig = otel_trace._TRACER_PROVIDER  # noqa: SLF001
     try:
         yield
     finally:
-        otel_trace._TRACER_PROVIDER_SET_ONCE._done = False
-        otel_trace._TRACER_PROVIDER = provider_orig
+        otel_trace._TRACER_PROVIDER_SET_ONCE._done = False  # noqa: SLF001
+        otel_trace._TRACER_PROVIDER = provider_orig  # noqa: SLF001