diff --git a/src/build_workflow/build_recorder.py b/src/build_workflow/build_recorder.py
index 3e6fcee5e5..d3118a8513 100644
--- a/src/build_workflow/build_recorder.py
+++ b/src/build_workflow/build_recorder.py
@@ -16,7 +16,7 @@
 
 
 class BuildRecorder:
-    def __init__(self, target: BuildTarget):
+    def __init__(self, target: BuildTarget) -> None:
         self.build_manifest = self.BuildManifestBuilder(target)
         self.target = target
         self.name = target.name
@@ -52,7 +52,7 @@ def write_manifest(self) -> None:
         logging.info(f"Created build manifest {manifest_path}")
 
     class BuildManifestBuilder:
-        def __init__(self, target: BuildTarget):
+        def __init__(self, target: BuildTarget) -> None:
             self.data: Dict[str, Any] = {}
             self.data["build"] = {}
             self.data["build"]["id"] = target.build_id
diff --git a/src/ci_workflow/ci_check_list_source.py b/src/ci_workflow/ci_check_list_source.py
index 1d9467aba5..a2ada40218 100644
--- a/src/ci_workflow/ci_check_list_source.py
+++ b/src/ci_workflow/ci_check_list_source.py
@@ -31,7 +31,7 @@ def checkout(self, work_dir: str) -> None:
     }
 
     class InvalidCheckError(Exception):
-        def __init__(self, check: Any):
+        def __init__(self, check: Any) -> None:
             self.check = check
             super().__init__(f"Invalid check: {check.name}, must be one of {CiCheckListSource.CHECKS.keys()}.")
 
diff --git a/src/manifests/build/build_manifest_1_0.py b/src/manifests/build/build_manifest_1_0.py
index 78d4ed0cfe..d89200e51b 100644
--- a/src/manifests/build/build_manifest_1_0.py
+++ b/src/manifests/build/build_manifest_1_0.py
@@ -75,7 +75,7 @@ class BuildManifest_1_0(ComponentManifest['BuildManifest_1_0', 'BuildComponents_
         },
     }
 
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.build = self.Build(data["build"])
         self.components = BuildComponents_1_0(data.get("components", []))  # type: ignore[assignment]
@@ -88,7 +88,7 @@ def __to_dict__(self) -> dict:
         }
 
     class Build:
-        def __init__(self, data: Any):
+        def __init__(self, data: Any) -> None:
             self.name: str = data["name"]
             self.version = data["version"]
             self.architecture = data["architecture"]
@@ -114,7 +114,7 @@ def __create__(self, data: Any) -> 'BuildComponent_1_0':
 
 
 class BuildComponent_1_0(Component):
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.repository = data["repository"]
         self.ref = data["ref"]
diff --git a/src/manifests/build/build_manifest_1_1.py b/src/manifests/build/build_manifest_1_1.py
index 586e43f73d..8b9b80884c 100644
--- a/src/manifests/build/build_manifest_1_1.py
+++ b/src/manifests/build/build_manifest_1_1.py
@@ -76,7 +76,7 @@ class BuildManifest_1_1(ComponentManifest['BuildManifest_1_1', 'BuildComponents_
         },
     }
 
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.build = self.Build(data["build"])
         self.components = BuildComponents_1_1(data.get("components", []))  # type: ignore[assignment]
@@ -89,7 +89,7 @@ def __to_dict__(self) -> dict:
         }
 
     class Build:
-        def __init__(self, data: Any):
+        def __init__(self, data: Any) -> None:
             self.name: str = data["name"]
             self.version = data["version"]
             self.architecture = data["architecture"]
@@ -115,7 +115,7 @@ def __create__(self, data: Any) -> 'BuildComponent_1_1':
 
 
 class BuildComponent_1_1(Component):
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.repository = data["repository"]
         self.ref = data["ref"]
diff --git a/src/manifests/build_manifest.py b/src/manifests/build_manifest.py
index 53a9de770a..f85021bb84 100644
--- a/src/manifests/build_manifest.py
+++ b/src/manifests/build_manifest.py
@@ -89,7 +89,7 @@ class BuildManifest(ComponentManifest['BuildManifest', 'BuildComponents']):
         },
     }
 
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.build = self.Build(data["build"])
         self.components = BuildComponents(data.get("components", []))  # type: ignore[assignment]
@@ -102,7 +102,7 @@ def __to_dict__(self) -> dict:
         }
 
     class Build:
-        def __init__(self, data: Any):
+        def __init__(self, data: Any) -> None:
             self.name: str = data["name"]
             self.version: str = data["version"]
             self.platform: str = data["platform"]
@@ -132,7 +132,7 @@ def __create__(self, data: Any) -> 'BuildComponent':
 
 
 class BuildComponent(Component):
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.repository = data["repository"]
         self.ref = data["ref"]
diff --git a/src/manifests/bundle/bundle_manifest_1_0.py b/src/manifests/bundle/bundle_manifest_1_0.py
index 2284f38e0a..dd254e4996 100644
--- a/src/manifests/bundle/bundle_manifest_1_0.py
+++ b/src/manifests/bundle/bundle_manifest_1_0.py
@@ -59,7 +59,7 @@ class BundleManifest_1_0(ComponentManifest['BundleManifest_1_0', 'BundleComponen
         },
     }
 
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.build = self.Build(data["build"])
         self.components = BundleComponents_1_0(data.get("components", []))  # type: ignore[assignment]
@@ -72,7 +72,7 @@ def __to_dict__(self) -> dict:
         }
 
     class Build:
-        def __init__(self, data: Any):
+        def __init__(self, data: Any) -> None:
             self.name = data["name"]
             self.version = data["version"]
             self.architecture = data["architecture"]
@@ -96,7 +96,7 @@ def __create__(self, data: Any) -> 'BundleComponent_1_0':
 
 
 class BundleComponent_1_0(Component):
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.repository = data["repository"]
         self.ref = data["ref"]
diff --git a/src/manifests/bundle_manifest.py b/src/manifests/bundle_manifest.py
index 6c3e538eea..26daaf61b7 100644
--- a/src/manifests/bundle_manifest.py
+++ b/src/manifests/bundle_manifest.py
@@ -78,7 +78,7 @@ def __to_dict__(self) -> dict:
         }
 
     class Build:
-        def __init__(self, data: Dict[str, str]):
+        def __init__(self, data: Dict[str, str]) -> None:
             self.name = data["name"]
             self.version = data["version"]
             self.platform = data["platform"]
@@ -110,7 +110,7 @@ def __create__(self, data: Any) -> 'BundleComponent':
 
 
 class BundleComponent(Component):
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.repository = data["repository"]
         self.ref = data["ref"]
diff --git a/src/manifests/distribution.py b/src/manifests/distribution.py
index e41a763caa..5fc78a5711 100644
--- a/src/manifests/distribution.py
+++ b/src/manifests/distribution.py
@@ -4,7 +4,7 @@
 
 
 class DistributionNotFound(Exception):
-    def __init__(self, urls: List[str]):
+    def __init__(self, urls: List[str]) -> None:
         self.urls = urls
         super().__init__(f"Unable to find a distribution under urls {self.urls}")
 
diff --git a/src/manifests/input_manifest.py b/src/manifests/input_manifest.py
index cd232dbc99..f3bcbd3022 100644
--- a/src/manifests/input_manifest.py
+++ b/src/manifests/input_manifest.py
@@ -101,7 +101,7 @@ class InputManifest(ComponentManifest['InputManifest', 'InputComponents']):
         },
     }
 
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
 
         self.build = self.Build(data["build"])
@@ -123,14 +123,14 @@ def stable(self) -> 'InputManifest':
         return manifest
 
     class Ci:
-        def __init__(self, data: Any):
+        def __init__(self, data: Any) -> None:
             self.image = None if data is None else self.Image(data.get("image", None))
 
         def __to_dict__(self) -> Optional[dict]:
             return None if self.image is None else {"image": self.image.__to_dict__()}
 
         class Image:
-            def __init__(self, data: Any):
+            def __init__(self, data: Any) -> None:
                 self.name = data["name"]
                 self.args = data.get("args", None)
 
@@ -141,7 +141,7 @@ def __to_dict__(self) -> dict:
                 }
 
     class Build:
-        def __init__(self, data: Any):
+        def __init__(self, data: Any) -> None:
             self.name: str = data["name"]
             self.version = data["version"]
             self.qualifier = data.get("qualifier", None)
@@ -199,7 +199,7 @@ def select(self, focus: List[str] = [], platform: str = None) -> Iterator['Input
 
 
 class InputComponent(Component):
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.platforms = data.get("platforms", None)
         self.checks = list(map(lambda entry: Check(entry), data.get("checks", [])))
@@ -255,7 +255,7 @@ def __to_dict__(self) -> dict:
 
 
 class InputComponentFromDist(InputComponent):
-    def __init__(self, data: Any):
+    def __init__(self, data: Any) -> None:
         super().__init__(data)
         self.dist = data["dist"]
 
diff --git a/src/manifests/manifests.py b/src/manifests/manifests.py
index 3a811b5910..38b5e86314 100644
--- a/src/manifests/manifests.py
+++ b/src/manifests/manifests.py
@@ -16,7 +16,7 @@
 
 
 class Manifests(SortedDict, Generic[T]):
-    def __init__(self, klass: Any, files: List[str]):
+    def __init__(self, klass: Any, files: List[str]) -> None:
         super(Manifests, self).__init__()
         self.klass = klass
         self.__append__(files)
diff --git a/src/manifests/test_manifest.py b/src/manifests/test_manifest.py
index 6ebcf75050..42588a3c1f 100644
--- a/src/manifests/test_manifest.py
+++ b/src/manifests/test_manifest.py
@@ -92,14 +92,14 @@ def __to_dict__(self) -> dict:
         }
 
     class Ci:
-        def __init__(self, data: Any):
+        def __init__(self, data: Any) -> None:
             self.image = None if data is None else self.Image(data.get("image", None))
 
         def __to_dict__(self) -> Optional[dict]:
             return None if self.image is None else {"image": self.image.__to_dict__()}
 
         class Image:
-            def __init__(self, data: Any):
+            def __init__(self, data: Any) -> None:
                 self.name = data["name"]
                 self.args = data.get("args", None)
 
diff --git a/src/sign_workflow/sign_artifacts.py b/src/sign_workflow/sign_artifacts.py
index 1980552ff0..7355926d8b 100644
--- a/src/sign_workflow/sign_artifacts.py
+++ b/src/sign_workflow/sign_artifacts.py
@@ -23,7 +23,7 @@ class SignArtifacts:
     signature_type: str
     signer: Signer
 
-    def __init__(self, target: Path, components: List[str], artifact_type: str, signature_type: str, signer: Signer):
+    def __init__(self, target: Path, components: List[str], artifact_type: str, signature_type: str, signer: Signer) -> None:
         self.target = target
         self.components = components
         self.artifact_type = artifact_type
diff --git a/src/system/temporary_directory.py b/src/system/temporary_directory.py
index 511a66b66e..aff46393d8 100644
--- a/src/system/temporary_directory.py
+++ b/src/system/temporary_directory.py
@@ -25,7 +25,7 @@ def g__handleRemoveReadonly(func: FunctionType, path: str, exc: Any) -> Any:
 
 
 class TemporaryDirectory:
-    def __init__(self, keep: bool = False, chdir: bool = False):
+    def __init__(self, keep: bool = False, chdir: bool = False) -> None:
         self.keep = keep
         self.name = tempfile.mkdtemp()
         if chdir:
diff --git a/src/test_workflow/bwc_test/bwc_test_runner_opensearch.py b/src/test_workflow/bwc_test/bwc_test_runner_opensearch.py
index c40f459f2d..dcf4712ad9 100644
--- a/src/test_workflow/bwc_test/bwc_test_runner_opensearch.py
+++ b/src/test_workflow/bwc_test/bwc_test_runner_opensearch.py
@@ -19,7 +19,7 @@
 
 class BwcTestRunnerOpenSearch(BwcTestRunner):
 
-    def __init__(self, args: TestArgs, test_manifest: TestManifest):
+    def __init__(self, args: TestArgs, test_manifest: TestManifest) -> None:
         self.properties = BwcTestStartPropertiesOpenSearch(args.paths.get("opensearch", os.getcwd()))
         super().__init__(args, test_manifest, self.properties.build_manifest.components)
         logging.info("Entering BWC test for OpenSearch")
diff --git a/src/test_workflow/dependency_installer_opensearch.py b/src/test_workflow/dependency_installer_opensearch.py
index c2a6789ef1..0a7c5e9fa2 100644
--- a/src/test_workflow/dependency_installer_opensearch.py
+++ b/src/test_workflow/dependency_installer_opensearch.py
@@ -13,7 +13,7 @@
 
 class DependencyInstallerOpenSearch(DependencyInstaller):
 
-    def __init__(self, root_url: str, build_manifest: BuildManifest, bundle_manifest: BundleManifest):
+    def __init__(self, root_url: str, build_manifest: BuildManifest, bundle_manifest: BundleManifest) -> None:
         super().__init__(root_url, build_manifest, bundle_manifest)
 
     @property
diff --git a/src/test_workflow/dependency_installer_opensearch_dashboards.py b/src/test_workflow/dependency_installer_opensearch_dashboards.py
index e096991db4..fe40b193f4 100644
--- a/src/test_workflow/dependency_installer_opensearch_dashboards.py
+++ b/src/test_workflow/dependency_installer_opensearch_dashboards.py
@@ -11,5 +11,5 @@
 
 class DependencyInstallerOpenSearchDashboards(DependencyInstaller):
 
-    def __init__(self, root_url: str, build_manifest: BuildManifest, bundle_manifest: BundleManifest):
+    def __init__(self, root_url: str, build_manifest: BuildManifest, bundle_manifest: BundleManifest) -> None:
         super().__init__(root_url, build_manifest, bundle_manifest)
diff --git a/src/test_workflow/integ_test/integ_test_runner_opensearch_dashboards.py b/src/test_workflow/integ_test/integ_test_runner_opensearch_dashboards.py
index b4e322cff8..8eac303034 100644
--- a/src/test_workflow/integ_test/integ_test_runner_opensearch_dashboards.py
+++ b/src/test_workflow/integ_test/integ_test_runner_opensearch_dashboards.py
@@ -20,7 +20,7 @@ class IntegTestRunnerOpenSearchDashboards(IntegTestRunner):
     properties: IntegTestStartPropertiesOpenSearchDashboards
     properties_dependency: IntegTestStartPropertiesOpenSearch
 
-    def __init__(self, args: TestArgs, test_manifest: TestManifest):
+    def __init__(self, args: TestArgs, test_manifest: TestManifest) -> None:
         self.properties_dependency = IntegTestStartPropertiesOpenSearch(args.paths.get("opensearch", os.getcwd()))
         self.properties = IntegTestStartPropertiesOpenSearchDashboards(args.paths.get("opensearch-dashboards", os.getcwd()))
         super().__init__(args, test_manifest, self.properties.build_manifest.components)
diff --git a/src/test_workflow/integ_test/integ_test_start_properties_opensearch.py b/src/test_workflow/integ_test/integ_test_start_properties_opensearch.py
index 3860d84b3c..f120a2b7b7 100644
--- a/src/test_workflow/integ_test/integ_test_start_properties_opensearch.py
+++ b/src/test_workflow/integ_test/integ_test_start_properties_opensearch.py
@@ -11,6 +11,6 @@
 class IntegTestStartPropertiesOpenSearch(IntegTestStartProperties):
     dependency_installer: DependencyInstallerOpenSearch
 
-    def __init__(self, path: str):
+    def __init__(self, path: str) -> None:
         super().__init__(path, "builds/opensearch/manifest.yml", "dist/opensearch/manifest.yml")
         self.dependency_installer = DependencyInstallerOpenSearch(self.path, self.build_manifest, self.bundle_manifest)
diff --git a/src/test_workflow/perf_test/perf_test_cluster_config.py b/src/test_workflow/perf_test/perf_test_cluster_config.py
index 5574e505e3..3cce942ff7 100644
--- a/src/test_workflow/perf_test/perf_test_cluster_config.py
+++ b/src/test_workflow/perf_test/perf_test_cluster_config.py
@@ -15,7 +15,7 @@ class PerfTestClusterConfig():
     """
     Maintains the cluster level configuration.
     """
-    def __init__(self, security: bool = False, data_nodes: int = 1, master_nodes: int = 0, ingest_nodes: int = 0, client_nodes: int = 0):
+    def __init__(self, security: bool = False, data_nodes: int = 1, master_nodes: int = 0, ingest_nodes: int = 0, client_nodes: int = 0) -> None:
         self.security = security
         self.data_nodes = data_nodes
         self.master_nodes = master_nodes
diff --git a/src/test_workflow/test_recorder/test_recorder.py b/src/test_workflow/test_recorder/test_recorder.py
index 7d74016fe3..9a1b48af29 100644
--- a/src/test_workflow/test_recorder/test_recorder.py
+++ b/src/test_workflow/test_recorder/test_recorder.py
@@ -90,7 +90,7 @@ def save_test_result_data(self, test_result_data: TestResultData) -> None:
 class RemoteClusterLogs(LogRecorder):
     parent_class: TestRecorder
 
-    def __init__(self, parent_class: TestRecorder):
+    def __init__(self, parent_class: TestRecorder) -> None:
         self.parent_class = parent_class
 
     def save_test_result_data(self, test_result_data: TestResultData) -> None:
@@ -107,7 +107,7 @@ def save_test_result_data(self, test_result_data: TestResultData) -> None:
 class TestResultsLogs(LogRecorder):
     parent_class: TestRecorder
 
-    def __init__(self, parent_class: TestRecorder):
+    def __init__(self, parent_class: TestRecorder) -> None:
         self.parent_class = parent_class
 
     def save_test_result_data(self, test_result_data: TestResultData) -> None:
diff --git a/src/test_workflow/test_result/test_result.py b/src/test_workflow/test_result/test_result.py
index d8c5ad0f2e..49dc778406 100644
--- a/src/test_workflow/test_result/test_result.py
+++ b/src/test_workflow/test_result/test_result.py
@@ -7,7 +7,7 @@ class TestResult:
     config: dict
     status: int
 
-    def __init__(self, component: str, config: dict, status: int):
+    def __init__(self, component: str, config: dict, status: int) -> None:
         self.component = component
         self.config = config
         self.status = status