diff --git a/cmd/chain.go b/cmd/chain.go
index 3defa13d..b258dab0 100644
--- a/cmd/chain.go
+++ b/cmd/chain.go
@@ -19,6 +19,7 @@ import (
 	"fmt"
 
 	"github.com/aeternity/aepp-sdk-go/aeternity"
+	"github.com/aeternity/aepp-sdk-go/swagguard/node/models"
 	"github.com/spf13/cobra"
 )
 
@@ -38,7 +39,7 @@ var topCmd = &cobra.Command{
 
 func topFunc(cmd *cobra.Command, args []string) (err error) {
 	aeNode := NewAeNode()
-	v, err := aeNode.GetTopBlock()
+	v, err := topDo(aeNode)
 	if err != nil {
 		return err
 	}
@@ -46,6 +47,15 @@ func topFunc(cmd *cobra.Command, args []string) (err error) {
 	return nil
 }
 
+type getTopBlocker interface {
+	GetTopBlock() (kb *models.KeyBlockOrMicroBlockHeader, err error)
+}
+
+func topDo(conn getTopBlocker) (kb *models.KeyBlockOrMicroBlockHeader, err error) {
+	kb, err = conn.GetTopBlock()
+	return
+}
+
 var statusCmd = &cobra.Command{
 	Use:   "status",
 	Short: "Get the status and status of the node running the chain",
@@ -53,9 +63,13 @@ var statusCmd = &cobra.Command{
 	RunE:  statusFunc,
 }
 
+type getStatuser interface {
+	GetStatus() (status *models.Status, err error)
+}
+
 func statusFunc(cmd *cobra.Command, args []string) (err error) {
 	aeNode := NewAeNode()
-	v, err := aeNode.GetStatus()
+	v, err := statusDo(aeNode)
 	if err != nil {
 		return err
 	}
@@ -63,6 +77,11 @@ func statusFunc(cmd *cobra.Command, args []string) (err error) {
 	return nil
 }
 
+func statusDo(conn getStatuser) (status *models.Status, err error) {
+	status, err = conn.GetStatus()
+	return
+}
+
 var limit, startFromHeight uint64
 var playCmd = &cobra.Command{
 	Use:   "play",
@@ -141,15 +160,28 @@ var ttlCmd = &cobra.Command{
 
 func ttlFunc(cmd *cobra.Command, args []string) (err error) {
 	ae := NewAeNode()
-	height, err := ae.GetHeight()
+	ans, err := ttlDo(ae)
 	if err != nil {
-		errFinal := fmt.Errorf("Error getting height from the node: %v", err)
-		return errFinal
+		return
 	}
-	fmt.Println(height + aeternity.Config.Client.TTL)
+	fmt.Println(ans)
 	return nil
 }
 
+type getHeighter interface {
+	GetHeight() (uint64, error)
+}
+
+func ttlDo(conn getHeighter) (ttl uint64, err error) {
+	height, err := conn.GetHeight()
+	if err != nil {
+		errFinal := fmt.Errorf("Error getting height from the node: %v", err)
+		return 0, errFinal
+	}
+	ttl = height + aeternity.Config.Client.TTL
+	return
+}
+
 var networkIDCmd = &cobra.Command{
 	Use:   "networkid",
 	Short: "Get the node's network_id",
@@ -160,15 +192,24 @@ var networkIDCmd = &cobra.Command{
 
 func networkIDFunc(cmd *cobra.Command, args []string) (err error) {
 	ae := NewAeNode()
-	resp, err := ae.GetStatus()
+	nID, err := networkIDDo(ae)
 	if err != nil {
-		errFinal := fmt.Errorf("Error getting status information from the node: %v", err)
-		return errFinal
+		return err
 	}
-	fmt.Println(*resp.NetworkID)
+	fmt.Println(nID)
 	return nil
 }
 
+func networkIDDo(conn getStatuser) (networkID string, err error) {
+	resp, err := conn.GetStatus()
+	if err != nil {
+		errFinal := fmt.Errorf("Error getting status information from the node: %v", err)
+		return "", errFinal
+	}
+	networkID = *resp.NetworkID
+	return
+}
+
 func init() {
 	RootCmd.AddCommand(chainCmd)
 	chainCmd.AddCommand(topCmd)
diff --git a/cmd/contract.go b/cmd/contract.go
index 541d1da7..9426f083 100644
--- a/cmd/contract.go
+++ b/cmd/contract.go
@@ -5,7 +5,6 @@ import (
 	"io/ioutil"
 	"os"
 
-	"github.com/aeternity/aepp-sdk-go/aeternity"
 	"github.com/spf13/cobra"
 )
 
@@ -26,7 +25,7 @@ var compileCmd = &cobra.Command{
 }
 
 func compileFunc(cmd *cobra.Command, args []string) (err error) {
-	compiler := aeternity.NewCompiler(compilerURL, debug)
+	compiler := NewCompiler()
 	s, err := readSource(args[0])
 	if err != nil {
 		return err
@@ -47,7 +46,7 @@ var encodeCalldataCmd = &cobra.Command{
 }
 
 func encodeCalldataFunc(cmd *cobra.Command, args []string) (err error) {
-	compiler := aeternity.NewCompiler(compilerURL, debug)
+	compiler := NewCompiler()
 
 	s, err := readSource(args[0])
 	if err != nil {
@@ -72,7 +71,7 @@ var decodeCalldataCmd = &cobra.Command{
 }
 
 func decodeCalldataFunc(cmd *cobra.Command, args []string) (err error) {
-	compiler := aeternity.NewCompiler(compilerURL, debug)
+	compiler := NewCompiler()
 
 	var decodeWithSource = func(path string, callData string) (function string, arguments []interface{}, err error) {
 		source, err := readSource(path)
diff --git a/cmd/root.go b/cmd/root.go
index 607bae74..9c9b9e0b 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -45,14 +45,24 @@ func Execute(v string) {
 	}
 }
 
-// NewAeNode is just a helper function that gives you a Node so that
-// you don't have to maintain a Node global variable (which needs the
-// config vars to be read immediately, with this helper function you can
-// defer the reading of the variables until the subcommand's execution)
-func NewAeNode() *aeternity.Node {
+// NewAeNode is just a helper function that gives you a Node so that you don't
+// have to maintain a Node global variable (which needs the config vars to be
+// read immediately, with this helper function you can defer the reading of the
+// variables until the subcommand's execution) Defined as a var so unittests can
+// mock this function out.
+var NewAeNode = func() *aeternity.Node {
 	return aeternity.NewNode(aeternity.Config.Node.URL, debug)
 }
 
+// NewCompiler is just a helper function that gives you a Compiler so that you don't
+// have to maintain a Compiler global variable (which needs the config vars to be
+// read immediately, with this helper function you can defer the reading of the
+// variables until the subcommand's execution) Defined as a var so unittests can
+// mock this function out.
+var NewCompiler = func() *aeternity.Compiler {
+	return aeternity.NewCompiler(compilerURL, debug)
+}
+
 func init() {
 	// cobra.OnInitialize(initConfig)
 	viper.AutomaticEnv() // read in environment variables that match