diff --git a/internal/cmd/certificate/list.go b/internal/cmd/certificate/list.go
index b13e5e22..5ea4e4e1 100644
--- a/internal/cmd/certificate/list.go
+++ b/internal/cmd/certificate/list.go
@@ -79,7 +79,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var certSchemas []schema.Certificate
+		certSchemas := make([]schema.Certificate, 0, len(resources))
 		for _, resource := range resources {
 			cert := resource.(*hcloud.Certificate)
 			certSchema := schema.Certificate{
diff --git a/internal/cmd/datacenter/list.go b/internal/cmd/datacenter/list.go
index e8ba19f6..e4b2706e 100644
--- a/internal/cmd/datacenter/list.go
+++ b/internal/cmd/datacenter/list.go
@@ -40,7 +40,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var dcSchemas []schema.Datacenter
+		dcSchemas := make([]schema.Datacenter, 0, len(resources))
 		for _, resource := range resources {
 			dc := resource.(*hcloud.Datacenter)
 			dcSchemas = append(dcSchemas, util.DatacenterToSchema(*dc))
diff --git a/internal/cmd/firewall/list.go b/internal/cmd/firewall/list.go
index 34ad63f2..a3bc31d3 100644
--- a/internal/cmd/firewall/list.go
+++ b/internal/cmd/firewall/list.go
@@ -66,7 +66,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var firewallSchemas []schema.Firewall
+		firewallSchemas := make([]schema.Firewall, 0, len(resources))
 		for _, resource := range resources {
 			firewall := resource.(*hcloud.Firewall)
 			firewallSchema := schema.Firewall{
diff --git a/internal/cmd/floatingip/list.go b/internal/cmd/floatingip/list.go
index 60c7c71f..e19acd7e 100644
--- a/internal/cmd/floatingip/list.go
+++ b/internal/cmd/floatingip/list.go
@@ -92,7 +92,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var floatingIPSchemas []schema.FloatingIP
+		floatingIPSchemas := make([]schema.FloatingIP, 0, len(resources))
 		for _, resource := range resources {
 			floatingIP := resource.(*hcloud.FloatingIP)
 			floatingIPSchema := schema.FloatingIP{
diff --git a/internal/cmd/image/list.go b/internal/cmd/image/list.go
index 84538594..0d3e396c 100644
--- a/internal/cmd/image/list.go
+++ b/internal/cmd/image/list.go
@@ -141,7 +141,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var imageSchemas []schema.Image
+		imageSchemas := make([]schema.Image, 0, len(resources))
 		for _, resource := range resources {
 			image := resource.(*hcloud.Image)
 			imageSchemas = append(imageSchemas, util.ImageToSchema(*image))
diff --git a/internal/cmd/iso/list.go b/internal/cmd/iso/list.go
index 94319aca..16bcf759 100644
--- a/internal/cmd/iso/list.go
+++ b/internal/cmd/iso/list.go
@@ -90,7 +90,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var isoSchemas []schema.ISO
+		isoSchemas := make([]schema.ISO, 0, len(resources))
 		for _, resource := range resources {
 			iso := resource.(*hcloud.ISO)
 			isoSchemas = append(isoSchemas, util.ISOToSchema(*iso))
diff --git a/internal/cmd/loadbalancer/list.go b/internal/cmd/loadbalancer/list.go
index c4d15ec3..b49d74b2 100644
--- a/internal/cmd/loadbalancer/list.go
+++ b/internal/cmd/loadbalancer/list.go
@@ -83,7 +83,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var loadBalancerSchemas []schema.LoadBalancer
+		loadBalancerSchemas := make([]schema.LoadBalancer, 0, len(resources))
 		for _, resource := range resources {
 			loadBalancer := resource.(*hcloud.LoadBalancer)
 			loadBalancerSchema := schema.LoadBalancer{
diff --git a/internal/cmd/loadbalancertype/list.go b/internal/cmd/loadbalancertype/list.go
index 049325ad..d22d4a97 100644
--- a/internal/cmd/loadbalancertype/list.go
+++ b/internal/cmd/loadbalancertype/list.go
@@ -38,7 +38,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var loadBalancerTypeSchemas []schema.LoadBalancerType
+		loadBalancerTypeSchemas := make([]schema.LoadBalancerType, 0, len(resources))
 		for _, resource := range resources {
 			loadBalancerType := resource.(*hcloud.LoadBalancerType)
 			loadBalancerTypeSchemas = append(loadBalancerTypeSchemas, util.LoadBalancerTypeToSchema(*loadBalancerType))
diff --git a/internal/cmd/location/list.go b/internal/cmd/location/list.go
index cf2897d1..a486a6ff 100644
--- a/internal/cmd/location/list.go
+++ b/internal/cmd/location/list.go
@@ -37,7 +37,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var locationSchemas []schema.Location
+		locationSchemas := make([]schema.Location, 0, len(resources))
 		for _, resource := range resources {
 			location := resource.(*hcloud.Location)
 			locationSchemas = append(locationSchemas, util.LocationToSchema(*location))
diff --git a/internal/cmd/network/list.go b/internal/cmd/network/list.go
index b89fdb55..01c32255 100644
--- a/internal/cmd/network/list.go
+++ b/internal/cmd/network/list.go
@@ -70,9 +70,8 @@ var ListCmd = base.ListCmd{
 				return util.Age(network.Created, time.Now())
 			}))
 	},
-
 	JSONSchema: func(resources []interface{}) interface{} {
-		var networkSchemas []schema.Network
+		networkSchemas := make([]schema.Network, 0, len(resources))
 		for _, resource := range resources {
 			network := resource.(*hcloud.Network)
 
diff --git a/internal/cmd/placementgroup/list.go b/internal/cmd/placementgroup/list.go
index 8df44e1e..0df5fa3e 100644
--- a/internal/cmd/placementgroup/list.go
+++ b/internal/cmd/placementgroup/list.go
@@ -55,7 +55,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var placementGroupSchemas []schema.PlacementGroup
+		placementGroupSchemas := make([]schema.PlacementGroup, 0, len(resources))
 		for _, resource := range resources {
 			placementGroup := resource.(*hcloud.PlacementGroup)
 			placementGroupSchema := schema.PlacementGroup{
diff --git a/internal/cmd/primaryip/list.go b/internal/cmd/primaryip/list.go
index 5374ad64..8b31006b 100644
--- a/internal/cmd/primaryip/list.go
+++ b/internal/cmd/primaryip/list.go
@@ -88,7 +88,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var primaryIPsSchema []schema.PrimaryIP
+		primaryIPsSchema := make([]schema.PrimaryIP, 0, len(resources))
 		for _, resource := range resources {
 			primaryIP := resource.(*hcloud.PrimaryIP)
 			var dnsPtrs []hcloud.PrimaryIPDNSPTR
diff --git a/internal/cmd/server/list.go b/internal/cmd/server/list.go
index f325f03d..c6502028 100644
--- a/internal/cmd/server/list.go
+++ b/internal/cmd/server/list.go
@@ -128,7 +128,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var serversSchema []schema.Server
+		serversSchema := make([]schema.Server, 0, len(resources))
 		for _, resource := range resources {
 			server := resource.(*hcloud.Server)
 
diff --git a/internal/cmd/servertype/list.go b/internal/cmd/servertype/list.go
index 2af76d32..f8a5e2cf 100644
--- a/internal/cmd/servertype/list.go
+++ b/internal/cmd/servertype/list.go
@@ -52,7 +52,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var serverTypeSchemas []schema.ServerType
+		serverTypeSchemas := make([]schema.ServerType, 0, len(resources))
 		for _, resource := range resources {
 			serverType := resource.(*hcloud.ServerType)
 			serverTypeSchemas = append(serverTypeSchemas, util.ServerTypeToSchema(*serverType))
diff --git a/internal/cmd/sshkey/list.go b/internal/cmd/sshkey/list.go
index 47376dd3..6e49d0d5 100644
--- a/internal/cmd/sshkey/list.go
+++ b/internal/cmd/sshkey/list.go
@@ -50,7 +50,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var sshKeySchemas []schema.SSHKey
+		sshKeySchemas := make([]schema.SSHKey, 0, len(resources))
 		for _, resource := range resources {
 			sshKey := resource.(*hcloud.SSHKey)
 			sshKeySchema := schema.SSHKey{
diff --git a/internal/cmd/volume/list.go b/internal/cmd/volume/list.go
index 509b0c2d..e152a478 100644
--- a/internal/cmd/volume/list.go
+++ b/internal/cmd/volume/list.go
@@ -76,7 +76,7 @@ var ListCmd = base.ListCmd{
 	},
 
 	JSONSchema: func(resources []interface{}) interface{} {
-		var volumesSchema []schema.Volume
+		volumesSchema := make([]schema.Volume, 0, len(resources))
 		for _, resource := range resources {
 			volume := resource.(*hcloud.Volume)
 			volumeSchema := schema.Volume{