diff --git a/shared/featureconfig/config.go b/shared/featureconfig/config.go
index eb7e102eb9a0..bcc137bb3717 100644
--- a/shared/featureconfig/config.go
+++ b/shared/featureconfig/config.go
@@ -249,7 +249,7 @@ func enableDevModeFlags(ctx *cli.Context) {
 }
 
 func complainOnDeprecatedFlags(ctx *cli.Context) {
-	for _, f := range DeprecatedFlags {
+	for _, f := range deprecatedFlags {
 		if ctx.IsSet(f.Names()[0]) {
 			log.Errorf("%s is deprecated and has no effect. Do not use this flag, it will be deleted soon.", f.Names()[0])
 		}
diff --git a/shared/featureconfig/flags.go b/shared/featureconfig/flags.go
index b20f32b3cf0b..d09af7a74179 100644
--- a/shared/featureconfig/flags.go
+++ b/shared/featureconfig/flags.go
@@ -309,7 +309,6 @@ var (
 		Usage:  deprecatedUsage,
 		Hidden: true,
 	}
-	// UseSpanCacheFlag enables the slasher to use span cache.
 	deprecatedUseSpanCacheFlag = &cli.BoolFlag{
 		Name:   "span-map-cache",
 		Usage:  deprecatedUsage,
@@ -317,9 +316,7 @@ var (
 	}
 )
 
-// DeprecatedFlags list of old flags that are not being used in codebase
-// anymore.
-var DeprecatedFlags = []cli.Flag{
+var deprecatedFlags = []cli.Flag{
 	deprecatedEnableDynamicCommitteeSubnets,
 	deprecatedNoCustomConfigFlag,
 	deprecatedEnableInitSyncQueue,
@@ -353,7 +350,7 @@ var DeprecatedFlags = []cli.Flag{
 }
 
 // ValidatorFlags contains a list of all the feature flags that apply to the validator client.
-var ValidatorFlags = append(DeprecatedFlags, []cli.Flag{
+var ValidatorFlags = append(deprecatedFlags, []cli.Flag{
 	minimalConfigFlag,
 	disableProtectAttesterFlag,
 	disableProtectProposerFlag,
@@ -361,6 +358,9 @@ var ValidatorFlags = append(DeprecatedFlags, []cli.Flag{
 	waitForSyncedFlag,
 }...)
 
+// SlasherFlags contains a list of all the feature flags that apply to the slasher client.
+var SlasherFlags = append(deprecatedFlags, []cli.Flag{}...)
+
 // E2EValidatorFlags contains a list of the validator feature flags to be tested in E2E.
 var E2EValidatorFlags = []string{
 	"--enable-domain-data-cache",
@@ -368,7 +368,7 @@ var E2EValidatorFlags = []string{
 }
 
 // BeaconChainFlags contains a list of all the feature flags that apply to the beacon-chain client.
-var BeaconChainFlags = append(DeprecatedFlags, []cli.Flag{
+var BeaconChainFlags = append(deprecatedFlags, []cli.Flag{
 	devModeFlag,
 	customGenesisDelayFlag,
 	minimalConfigFlag,
diff --git a/shared/featureconfig/flags_test.go b/shared/featureconfig/flags_test.go
index cde8016dd2b4..aa9d4975b7fa 100644
--- a/shared/featureconfig/flags_test.go
+++ b/shared/featureconfig/flags_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestDeprecatedFlags(t *testing.T) {
-	for _, f := range DeprecatedFlags {
+	for _, f := range deprecatedFlags {
 		fv := reflect.ValueOf(f)
 		field := reflect.Indirect(fv).FieldByName("Hidden")
 		if !field.IsValid() || !field.Bool() {
diff --git a/slasher/main.go b/slasher/main.go
index fcf3fc9565a0..6f17a1644527 100644
--- a/slasher/main.go
+++ b/slasher/main.go
@@ -43,7 +43,6 @@ var appFlags = []cli.Flag{
 	cmd.TracingProcessNameFlag,
 	cmd.TracingEndpointFlag,
 	cmd.TraceSampleFractionFlag,
-	cmd.BootstrapNode,
 	flags.MonitoringPortFlag,
 	cmd.LogFileName,
 	cmd.LogFormat,
@@ -61,10 +60,9 @@ var appFlags = []cli.Flag{
 	flags.BeaconCertFlag,
 	flags.BeaconRPCProviderFlag,
 }
-var allFlags []cli.Flag
 
 func init() {
-	allFlags = append(appFlags, featureconfig.DeprecatedFlags[:]...)
+	appFlags = cmd.WrapFlags(append(appFlags, featureconfig.SlasherFlags...))
 }
 
 func main() {
@@ -72,7 +70,7 @@ func main() {
 	app.Name = "hash slinging slasher"
 	app.Usage = `launches an Ethereum Serenity slasher server that interacts with a beacon chain.`
 	app.Version = version.GetVersion()
-	app.Flags = allFlags
+	app.Flags = appFlags
 	app.Action = startSlasher
 	app.Before = func(ctx *cli.Context) error {
 		format := ctx.String(cmd.LogFormat.Name)
diff --git a/slasher/usage.go b/slasher/usage.go
index 720bdd440606..aeb7f151b6c1 100644
--- a/slasher/usage.go
+++ b/slasher/usage.go
@@ -49,7 +49,6 @@ var appHelpFlagGroups = []flagGroup{
 			cmd.TracingProcessNameFlag,
 			cmd.TracingEndpointFlag,
 			cmd.TraceSampleFractionFlag,
-			cmd.BootstrapNode,
 			flags.MonitoringPortFlag,
 			cmd.LogFormat,
 			cmd.LogFileName,
diff --git a/slasher/usage_test.go b/slasher/usage_test.go
index 0b93921f6422..1a358ba64791 100644
--- a/slasher/usage_test.go
+++ b/slasher/usage_test.go
@@ -3,6 +3,8 @@ package main
 import (
 	"testing"
 
+	"github.com/prysmaticlabs/prysm/shared/featureconfig"
+
 	"gopkg.in/urfave/cli.v2"
 )
 
@@ -15,6 +17,8 @@ func TestAllFlagsExistInHelp(t *testing.T) {
 	for _, group := range appHelpFlagGroups {
 		helpFlags = append(helpFlags, group.Flags...)
 	}
+	helpFlags = featureconfig.ActiveFlags(helpFlags)
+	appFlags = featureconfig.ActiveFlags(appFlags)
 
 	for _, flag := range appFlags {
 		if !doesFlagExist(flag, helpFlags) {
@@ -32,10 +36,9 @@ func TestAllFlagsExistInHelp(t *testing.T) {
 
 func doesFlagExist(flag cli.Flag, flags []cli.Flag) bool {
 	for _, f := range flags {
-		if f == flag {
+		if f.String() == flag.String() {
 			return true
 		}
 	}
-
 	return false
 }
diff --git a/validator/usage_test.go b/validator/usage_test.go
index 215397da016e..c1a92cbb87c9 100644
--- a/validator/usage_test.go
+++ b/validator/usage_test.go
@@ -39,6 +39,5 @@ func doesFlagExist(flag cli.Flag, flags []cli.Flag) bool {
 			return true
 		}
 	}
-
 	return false
 }