diff --git a/.github/workflows/kind-e2e.yaml b/.github/workflows/kind-e2e.yaml
index 53de9186ae..4d223d6832 100644
--- a/.github/workflows/kind-e2e.yaml
+++ b/.github/workflows/kind-e2e.yaml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        k8sVersion: ["1.25.x", "1.26.x", "1.27.x", "1.28.x", "1.29.x", "1.30.x"]
+        k8sVersion: ["1.25.x", "1.26.x", "1.27.x", "1.28.x", "1.29.x", "1.30.x", "1.31.x"]
     steps:
     - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
     - name: Set up Python 3.10
diff --git a/.github/workflows/presubmit.yaml b/.github/workflows/presubmit.yaml
index 0b113a96cb..45730c8a7d 100644
--- a/.github/workflows/presubmit.yaml
+++ b/.github/workflows/presubmit.yaml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        k8sVersion: ["1.25.x", "1.26.x", "1.27.x", "1.28.x", "1.29.x", "1.30.x"]
+        k8sVersion: ["1.25.x", "1.26.x", "1.27.x", "1.28.x", "1.29.x", "1.30.x", "1.31.x"]
     steps:
     - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
     - uses: ./.github/actions/install-deps
@@ -25,7 +25,7 @@ jobs:
     - run: K8S_VERSION=${{ matrix.k8sVersion }} make presubmit
     - name: Send coverage
       # should only send converage once https://docs.coveralls.io/parallel-builds
-      if: matrix.k8sVersion == '1.30.x'
+      if: matrix.k8sVersion == '1.31.x'
       env:
         COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: goveralls -coverprofile=coverage.out -service=github
diff --git a/hack/toolchain.sh b/hack/toolchain.sh
index b6e44eb6bb..d1bf76ed2d 100755
--- a/hack/toolchain.sh
+++ b/hack/toolchain.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-K8S_VERSION="${K8S_VERSION:="1.30.x"}"
+K8S_VERSION="${K8S_VERSION:="1.31.x"}"
 KUBEBUILDER_ASSETS="/usr/local/kubebuilder/bin"
 
 main() {
diff --git a/pkg/test/environment.go b/pkg/test/environment.go
index d4573aac20..0d66529a71 100644
--- a/pkg/test/environment.go
+++ b/pkg/test/environment.go
@@ -86,7 +86,7 @@ func NewEnvironment(options ...option.Function[EnvironmentOptions]) *Environment
 	opts := option.Resolve(options...)
 	ctx, cancel := context.WithCancel(context.Background())
 
-	version := version.MustParseSemantic(strings.Replace(env.WithDefaultString("K8S_VERSION", "1.30.x"), ".x", ".0", -1))
+	version := version.MustParseSemantic(strings.Replace(env.WithDefaultString("K8S_VERSION", "1.31.x"), ".x", ".0", -1))
 	environment := envtest.Environment{Scheme: scheme.Scheme, CRDs: opts.crds}
 	if version.Minor() >= 21 {
 		// PodAffinityNamespaceSelector is used for label selectors in pod affinities.  If the feature-gate is turned off,