diff --git a/Makefile b/Makefile
index ec43462bc..d122c6d23 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@ TALOSCTL_DEFAULT_TARGET := talosctl-$(OPERATING_SYSTEM)
 INTEGRATION_TEST_DEFAULT_TARGET := integration-test-$(OPERATING_SYSTEM)
 INTEGRATION_TEST_PROVISION_DEFAULT_TARGET := integration-test-provision-$(OPERATING_SYSTEM)
 KUBECTL_URL ?= https://storage.googleapis.com/kubernetes-release/release/v1.21.0-rc.0/bin/$(OPERATING_SYSTEM)/amd64/kubectl
-CLUSTERCTL_VERSION ?= 0.3.14
+CLUSTERCTL_VERSION ?= 0.3.15
 CLUSTERCTL_URL ?= https://github.com/kubernetes-sigs/cluster-api/releases/download/v$(CLUSTERCTL_VERSION)/clusterctl-$(OPERATING_SYSTEM)-amd64
 SONOBUOY_VERSION ?= 0.50.0
 SONOBUOY_URL ?= https://github.com/vmware-tanzu/sonobuoy/releases/download/v$(SONOBUOY_VERSION)/sonobuoy_$(SONOBUOY_VERSION)_$(OPERATING_SYSTEM)_amd64.tar.gz
diff --git a/internal/integration/api/apply-config.go b/internal/integration/api/apply-config.go
index 7a7ab649f..973d37ea6 100644
--- a/internal/integration/api/apply-config.go
+++ b/internal/integration/api/apply-config.go
@@ -97,9 +97,16 @@ func (suite *ApplyConfigSuite) TestApply() {
 	provider, err := suite.readConfigFromNode(nodeCtx)
 	suite.Assert().Nilf(err, "failed to read existing config from node %q: %w", node, err)
 
-	provider.Machine().Sysctls()[applyConfigTestSysctl] = applyConfigTestSysctlVal
+	cfg, ok := provider.(*v1alpha1.Config)
+	suite.Require().True(ok)
 
-	cfgDataOut, err := provider.Bytes()
+	if cfg.MachineConfig.MachineSysctls == nil {
+		cfg.MachineConfig.MachineSysctls = make(map[string]string)
+	}
+
+	cfg.MachineConfig.MachineSysctls[applyConfigTestSysctl] = applyConfigTestSysctlVal
+
+	cfgDataOut, err := cfg.Bytes()
 	suite.Assert().Nilf(err, "failed to marshal updated machine config data (node %q): %w", node, err)
 
 	suite.AssertRebooted(suite.ctx, node, func(nodeCtx context.Context) error {
@@ -144,9 +151,16 @@ func (suite *ApplyConfigSuite) TestApplyOnReboot() {
 	provider, err := suite.readConfigFromNode(nodeCtx)
 	suite.Require().NoError(err, "failed to read existing config from node %q", node)
 
-	provider.Machine().Sysctls()[applyConfigNoRebootTestSysctl] = applyConfigNoRebootTestSysctlVal
+	cfg, ok := provider.(*v1alpha1.Config)
+	suite.Require().True(ok)
 
-	cfgDataOut, err := provider.Bytes()
+	if cfg.MachineConfig.MachineSysctls == nil {
+		cfg.MachineConfig.MachineSysctls = make(map[string]string)
+	}
+
+	cfg.MachineConfig.MachineSysctls[applyConfigNoRebootTestSysctl] = applyConfigNoRebootTestSysctlVal
+
+	cfgDataOut, err := cfg.Bytes()
 	suite.Require().NoError(err, "failed to marshal updated machine config data (node %q)", node)
 
 	_, err = suite.Client.ApplyConfiguration(nodeCtx, &machineapi.ApplyConfigurationRequest{
@@ -167,10 +181,13 @@ func (suite *ApplyConfigSuite) TestApplyOnReboot() {
 		applyConfigNoRebootTestSysctlVal,
 	)
 
-	// revert back
-	delete(provider.Machine().Sysctls(), applyConfigNoRebootTestSysctl)
+	cfg, ok = newProvider.(*v1alpha1.Config)
+	suite.Require().True(ok)
 
-	cfgDataOut, err = provider.Bytes()
+	// revert back
+	delete(cfg.MachineConfig.MachineSysctls, applyConfigNoRebootTestSysctl)
+
+	cfgDataOut, err = cfg.Bytes()
 	suite.Require().NoError(err, "failed to marshal updated machine config data (node %q)", node)
 
 	_, err = suite.Client.ApplyConfiguration(nodeCtx, &machineapi.ApplyConfigurationRequest{