diff --git a/.test-defs/OWNERS b/.test-defs/OWNERS
new file mode 100644
index 00000000000..8b3960680b3
--- /dev/null
+++ b/.test-defs/OWNERS
@@ -0,0 +1,6 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+reviewers:
+- testmachinery-maintainers
+approvers:
+- testmachinery-maintainers
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 00000000000..67baa078fb7
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,6 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+reviewers:
+- gardener-reviewers
+approvers:
+- gardener-approvers
diff --git a/OWNERS_ALIASES b/OWNERS_ALIASES
new file mode 100644
index 00000000000..659ff7a50a8
--- /dev/null
+++ b/OWNERS_ALIASES
@@ -0,0 +1,30 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+aliases:
+  gardener-reviewers:
+  - acumino
+  - ary1992
+  - BeckerMax
+  - ialidzhikov
+  - kris94
+  - plkokanov
+  - rfranzke
+  - shafeeqes
+  - stoyanr
+  - timebertt
+  - timuthy
+  gardener-approvers:
+  - acumino
+  - ary1992
+  - BeckerMax
+  - ialidzhikov
+  - kris94
+  - plkokanov
+  - rfranzke
+  - shafeeqes
+  - stoyanr
+  - timebertt
+  - timuthy
+  testmachinery-maintainers:
+  - dguendisch
+  - hendrikKahl
diff --git a/extensions/test/testmachinery/OWNERS b/extensions/test/testmachinery/OWNERS
new file mode 100644
index 00000000000..8b3960680b3
--- /dev/null
+++ b/extensions/test/testmachinery/OWNERS
@@ -0,0 +1,6 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+reviewers:
+- testmachinery-maintainers
+approvers:
+- testmachinery-maintainers
diff --git a/test/testmachinery/OWNERS b/test/testmachinery/OWNERS
new file mode 100644
index 00000000000..8b3960680b3
--- /dev/null
+++ b/test/testmachinery/OWNERS
@@ -0,0 +1,6 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+reviewers:
+- testmachinery-maintainers
+approvers:
+- testmachinery-maintainers