diff --git a/cmd/argocd/commands/admin/project_allowlist.go b/cmd/argocd/commands/admin/project_allowlist.go
index 2d9dd85b363f..aeac15a08585 100644
--- a/cmd/argocd/commands/admin/project_allowlist.go
+++ b/cmd/argocd/commands/admin/project_allowlist.go
@@ -63,7 +63,13 @@ func NewProjectAllowListGenCommand() *cobra.Command {
 				}()
 			}
 
-			globalProj := generateProjectAllowList(clientConfig, clusterRoleFileName, projName)
+			config, err := clientConfig.ClientConfig()
+			errors.CheckError(err)
+			disco, err := discovery.NewDiscoveryClientForConfig(config)
+			errors.CheckError(err)
+			serverResources, err := disco.ServerPreferredResources()
+			errors.CheckError(err)
+			globalProj := generateProjectAllowList(serverResources, clusterRoleFileName, projName)
 
 			yamlBytes, err := yaml.Marshal(globalProj)
 			errors.CheckError(err)
@@ -78,7 +84,7 @@ func NewProjectAllowListGenCommand() *cobra.Command {
 	return command
 }
 
-func generateProjectAllowList(clientConfig clientcmd.ClientConfig, clusterRoleFileName string, projName string) v1alpha1.AppProject {
+func generateProjectAllowList(serverResources []*metav1.APIResourceList, clusterRoleFileName string, projName string) v1alpha1.AppProject {
 	yamlBytes, err := ioutil.ReadFile(clusterRoleFileName)
 	errors.CheckError(err)
 	var obj unstructured.Unstructured
@@ -89,13 +95,6 @@ func generateProjectAllowList(clientConfig clientcmd.ClientConfig, clusterRoleFi
 	err = scheme.Scheme.Convert(&obj, clusterRole, nil)
 	errors.CheckError(err)
 
-	config, err := clientConfig.ClientConfig()
-	errors.CheckError(err)
-	disco, err := discovery.NewDiscoveryClientForConfig(config)
-	errors.CheckError(err)
-	serverResources, err := disco.ServerPreferredResources()
-	errors.CheckError(err)
-
 	resourceList := make([]metav1.GroupKind, 0)
 	for _, rule := range clusterRole.Rules {
 		if len(rule.APIGroups) <= 0 {
diff --git a/cmd/argocd/commands/admin/project_allowlist_test.go b/cmd/argocd/commands/admin/project_allowlist_test.go
index 0d57db932fda..bb370e742bd4 100644
--- a/cmd/argocd/commands/admin/project_allowlist_test.go
+++ b/cmd/argocd/commands/admin/project_allowlist_test.go
@@ -1,63 +1,19 @@
 package admin
 
 import (
-	"reflect"
-	"runtime"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-	"github.com/undefinedlabs/go-mpatch"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/client-go/discovery"
-	restclient "k8s.io/client-go/rest"
-	"k8s.io/client-go/tools/clientcmd"
 )
 
 func TestProjectAllowListGen(t *testing.T) {
-	// go-mpatch only works on platforms with amd64 architecture
-	if runtime.GOARCH != "amd64" {
-		t.Skip()
+	res := metav1.APIResource{
+		Name: "services",
+		Kind: "Service",
 	}
+	resourceList := []*metav1.APIResourceList{{APIResources: []metav1.APIResource{res}}}
 
-	useMock := true
-	rules := clientcmd.NewDefaultClientConfigLoadingRules()
-	overrides := &clientcmd.ConfigOverrides{}
-	clientConfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, overrides)
-
-	if useMock {
-		var patchClientConfig *mpatch.Patch
-		patchClientConfig, err := mpatch.PatchInstanceMethodByName(reflect.TypeOf(clientConfig), "ClientConfig", func(*clientcmd.DeferredLoadingClientConfig) (*restclient.Config, error) {
-			return nil, nil
-		})
-		assert.NoError(t, err)
-
-		patch, err := mpatch.PatchMethod(discovery.NewDiscoveryClientForConfig, func(c *restclient.Config) (*discovery.DiscoveryClient, error) {
-			return &discovery.DiscoveryClient{LegacyPrefix: "/api"}, nil
-		})
-		assert.NoError(t, err)
-
-		var patchSeverPreferredResources *mpatch.Patch
-		discoClient := &discovery.DiscoveryClient{}
-		patchSeverPreferredResources, err = mpatch.PatchInstanceMethodByName(reflect.TypeOf(discoClient), "ServerPreferredResources", func(*discovery.DiscoveryClient) ([]*metav1.APIResourceList, error) {
-			res := metav1.APIResource{
-				Name: "services",
-				Kind: "Service",
-			}
-			resourceList := []*metav1.APIResourceList{{APIResources: []metav1.APIResource{res}}}
-			return resourceList, nil
-		})
-		assert.NoError(t, err)
-
-		defer func() {
-			err = patchClientConfig.Unpatch()
-			assert.NoError(t, err)
-			err = patch.Unpatch()
-			assert.NoError(t, err)
-			err = patchSeverPreferredResources.Unpatch()
-			err = patch.Unpatch()
-		}()
-	}
-
-	globalProj := generateProjectAllowList(clientConfig, "testdata/test_clusterrole.yaml", "testproj")
+	globalProj := generateProjectAllowList(resourceList, "testdata/test_clusterrole.yaml", "testproj")
 	assert.True(t, len(globalProj.Spec.NamespaceResourceWhitelist) > 0)
 }
diff --git a/go.mod b/go.mod
index f1121a85bde4..bcaf2d714c46 100644
--- a/go.mod
+++ b/go.mod
@@ -69,7 +69,6 @@ require (
 	github.com/spf13/cobra v1.3.0
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.7.0
-	github.com/undefinedlabs/go-mpatch v1.0.6
 	github.com/valyala/fasttemplate v1.2.1
 	github.com/whilp/git-urls v0.0.0-20191001220047-6db9661140c0
 	github.com/xanzy/go-gitlab v0.60.0
diff --git a/go.sum b/go.sum
index e61c20c0d4fa..2bb6fb9f0646 100644
--- a/go.sum
+++ b/go.sum
@@ -1064,8 +1064,6 @@ github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqri
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
 github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
-github.com/undefinedlabs/go-mpatch v1.0.6 h1:h8q5ORH/GaOE1Se1DMhrOyljXZEhRcROO7agMqWXCOY=
-github.com/undefinedlabs/go-mpatch v1.0.6/go.mod h1:TyJZDQ/5AgyN7FSLiBJ8RO9u2c6wbtRvK827b6AVqY4=
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/urfave/cli v1.22.2/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=