diff --git a/.github/workflows/ci.lint_test.yml b/.github/workflows/ci.lint_test.yml
index b650e7f..15d5edf 100644
--- a/.github/workflows/ci.lint_test.yml
+++ b/.github/workflows/ci.lint_test.yml
@@ -19,12 +19,13 @@ jobs:
           fetch-depth: 0
 
       - name: Lint Code Base
-        uses: docker://ghcr.io/github/super-linter:slim-v4
+        uses: docker://ghcr.io/github/super-linter:v4
         env:
           VALIDATE_ALL_CODEBASE: true
           DEFAULT_BRANCH: master
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           VALIDATE_GO: true
+          FILTER_REGEX_EXCLUDE: ".*test/.*"
 
   Test:
     name: "CI: Go Tests"
diff --git a/README.md b/README.md
index 3af6edc..ae8c3f9 100644
--- a/README.md
+++ b/README.md
@@ -29,10 +29,19 @@
 
 ## Install
 
+### Source
+
 ```sh
 go install github.com/riweston/aztx
 ```
 
+### brew
+
+```sh
+brew tap riweston/aztx
+brew install aztx
+```
+
 ## Usage
 
 ```sh
diff --git a/cmd/aztx/contexts.go b/cmd/aztx/contexts.go
index 713c819..7810347 100644
--- a/cmd/aztx/contexts.go
+++ b/cmd/aztx/contexts.go
@@ -17,74 +17,93 @@ limitations under the License.
 package aztx
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
-	"os/exec"
+	"io/ioutil"
+	"os"
 
+	"github.com/google/uuid"
 	"github.com/ktr0731/go-fuzzyfinder"
 )
 
-type Account struct {
-	CloudName        string   `json:"cloudName"`
-	HomeTenantID     string   `json:"homeTenantId"`
-	ID               string   `json:"id"`
-	IsDefault        bool     `json:"isDefault"`
-	ManagedByTenants []string `json:"managedByTenants"`
-	Name             string   `json:"name"`
-	State            string   `json:"state"`
-	TenantID         string   `json:"tenantId"`
+type Subscription struct {
+	EnvironmentName  string    `json:"environmentName"`
+	HomeTenantID     uuid.UUID `json:"homeTenantId"`
+	ID               uuid.UUID `json:"id"`
+	IsDefault        bool      `json:"isDefault"`
+	ManagedByTenants []string  `json:"managedByTenants"`
+	Name             string    `json:"name"`
+	State            string    `json:"state"`
+	TenantID         uuid.UUID `json:"tenantId"`
 	User             struct {
 		Name        string `json:"name"`
 		AccountType string `json:"type"`
 	} `json:"user"`
 }
 
-func GetAzureAccounts() []byte {
-	binary, errLook := exec.LookPath("az")
-	if errLook != nil {
-		panic(errLook)
-	}
+type File struct {
+	InstallationID uuid.UUID      `json:"installationId"`
+	Subscriptions  []Subscription `json:"subscriptions"`
+}
 
-	args := []string{"account", "list", "-o", "json"}
+func SelectAzureAccountsDisplayName() {
+	home, errHome := os.UserHomeDir()
+	if errHome != nil {
+		panic(errHome)
+	}
+	azureProfile := home + "/.azure/azureProfile.json"
+	d := ReadAzureProfile(azureProfile)
 
-	out, err := exec.Command(binary, args...).CombinedOutput()
-	// TODO: This currently breaks when selecting context
-	if err != nil {
-		panic(err)
+	idx, errFind := fuzzyfinder.Find(
+		d.Subscriptions,
+		func(i int) string {
+			return d.Subscriptions[i].Name
+		})
+	if errFind != nil {
+		panic(errFind)
 	}
 
-	return out
+	errWrite := WriteAzureProfile(d, d.Subscriptions[idx].ID, azureProfile)
+	if errWrite != nil {
+		panic(errWrite)
+	}
+	fmt.Print(d.Subscriptions[idx].Name, "\n", d.Subscriptions[idx].ID, "\n")
 }
 
-func SetAzureAccountContext(accountname string) {
-	binary, errLook := exec.LookPath("az")
-	if errLook != nil {
-		panic(errLook)
+func ReadAzureProfile(file string) File {
+	jsonFile, err := os.Open(file)
+	if err != nil {
+		fmt.Println(err)
+	}
+	byteValue, errByte := ioutil.ReadAll(jsonFile)
+	if errByte != nil {
+		fmt.Println(errByte)
+	}
+	byteValue = bytes.TrimPrefix(byteValue, []byte("\xef\xbb\xbf"))
+	var jsonData File
+	errJSON := json.Unmarshal(byteValue, &jsonData)
+	if errJSON != nil {
+		fmt.Println(err)
 	}
 
-	args := []string{"account", "set", "--subscription", accountname}
+	return jsonData
+}
 
-	_, err := exec.Command(binary, args...).Output()
-	if err != nil {
-		panic(err.Error())
+func WriteAzureProfile(file File, id uuid.UUID, outFile string) error {
+	for idx := range file.Subscriptions {
+		if file.Subscriptions[idx].ID == id {
+			file.Subscriptions[idx].IsDefault = true
+		} else {
+			file.Subscriptions[idx].IsDefault = false
+		}
 	}
-}
 
-func SelectAzureAccountsDisplayName() {
-	d := GetAzureAccounts()
-	var Accounts []Account
-	err := json.Unmarshal(d, &Accounts)
+	byteValue, err := json.Marshal(&file)
 	if err != nil {
-		panic(err)
-	}
-	idx, errFind := fuzzyfinder.Find(
-		Accounts,
-		func(i int) string {
-			return Accounts[i].Name
-		})
-	if errFind != nil {
-		panic(errFind)
+		return err
 	}
-	SetAzureAccountContext(Accounts[idx].Name)
-	fmt.Print(Accounts[idx].Name, "\n", Accounts[idx].ID, "\n")
+
+	err = ioutil.WriteFile(outFile, byteValue, 0600)
+	return err
 }
diff --git a/go.mod b/go.mod
index 128462f..4a6edbd 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,8 @@ module github.com/riweston/aztx
 
 go 1.16
 
-require github.com/ktr0731/go-fuzzyfinder v0.4.0
+require (
+	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/ktr0731/go-fuzzyfinder v0.4.0
+)
diff --git a/go.sum b/go.sum
index 05b35e8..acfbee8 100644
--- a/go.sum
+++ b/go.sum
@@ -82,6 +82,7 @@ github.com/Azure/go-autorest/autorest/validation v0.3.1/go.mod h1:yhLgjC0Wda5DYX
 github.com/Azure/go-autorest/logger v0.2.0/go.mod h1:T9E3cAhj2VqvPOtCYAvby9aBXkZmbF5NWuPV8+WeEW8=
 github.com/Azure/go-autorest/logger v0.2.1/go.mod h1:T9E3cAhj2VqvPOtCYAvby9aBXkZmbF5NWuPV8+WeEW8=
 github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBpUA79WCAKPPZVC2DeU=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/Djarvur/go-err113 v0.0.0-20210108212216-aea10b59be24/go.mod h1:4UJr5HIiMZrwgkSPdsjy2uOQExX/WEILpIrO9UPGuXs=
@@ -372,6 +373,8 @@ github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/wire v0.5.0/go.mod h1:ngWDr9Qvq3yZA10YrxfyGELY/AFWGVpy9c1LTRi1EoU=
 github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
diff --git a/test/aztx_function_test.go b/test/aztx_function_test.go
new file mode 100644
index 0000000..873e3e1
--- /dev/null
+++ b/test/aztx_function_test.go
@@ -0,0 +1,29 @@
+// +build !integration
+
+package aztx_test
+
+import (
+	"testing"
+
+	"github.com/google/uuid"
+	"github.com/riweston/aztx/cmd/aztx"
+)
+
+func TestReadFile(t *testing.T) {
+	value := aztx.ReadAzureProfile("azureProfile.json")
+	equals(t, "Test Subscription 1", value.Subscriptions[0].Name)
+}
+
+func TestWriteFile(t *testing.T) {
+	inputFile := aztx.ReadAzureProfile("azureProfile.json")
+	uuid, err := uuid.Parse("9e7969ef-4cb8-4a2d-959f-bfdaae452a3d")
+	if err != nil {
+		panic(err)
+	}
+	outFile := aztx.WriteAzureProfile(inputFile, uuid, "azureProfile_test.json")
+	ok(t, outFile)
+	value := aztx.ReadAzureProfile("azureProfile_test.json")
+	equals(t, true, value.Subscriptions[0].IsDefault)
+	equals(t, false, value.Subscriptions[1].IsDefault)
+	equals(t, false, value.Subscriptions[2].IsDefault)
+}
diff --git a/test/azureProfile.json b/test/azureProfile.json
new file mode 100644
index 0000000..e97e14a
--- /dev/null
+++ b/test/azureProfile.json
@@ -0,0 +1,47 @@
+{
+	"installationId": "e960b7cc-c5d9-11ea-a6f5-00155d82a4f4",
+	"subscriptions": [
+		{
+			"id": "9e7969ef-4cb8-4a2d-959f-bfdaae452a3d",
+			"name": "Test Subscription 1",
+			"state": "Enabled",
+			"user": {
+				"name": "First Last",
+				"type": "user"
+			},
+			"isDefault": false,
+			"tenantId": "9e7969ef-4cb8-4a2d-959f-bfdaae452a3d",
+			"environmentName": "AzureCloud",
+			"homeTenantId": "9e7969ef-4cb8-4a2d-959f-bfdaae452a3d",
+			"managedByTenants": []
+		},
+		{
+			"id": "9bb28eee-ebaa-442a-83ba-5511810fb151",
+			"name": "Test Subscription 2",
+			"state": "Enabled",
+			"user": {
+				"name": "First Last",
+				"type": "user"
+			},
+			"isDefault": false,
+			"tenantId": "9bb28eee-ebaa-442a-83ba-5511810fb151",
+			"environmentName": "AzureCloud",
+			"homeTenantId": "9bb28eee-ebaa-442a-83ba-5511810fb151",
+			"managedByTenants": []
+		},
+		{
+			"id": "8fff24dd-2842-4dbb-8a66-1410c7bc231f",
+			"name": "Test Subscription 3",
+			"state": "Enabled",
+			"user": {
+				"name": "First Last",
+				"type": "user"
+			},
+			"isDefault": false,
+			"tenantId": "8fff24dd-2842-4dbb-8a66-1410c7bc231f",
+			"environmentName": "AzureCloud",
+			"homeTenantId": "8fff24dd-2842-4dbb-8a66-1410c7bc231f",
+			"managedByTenants": []
+		}
+	]
+}
diff --git a/test/helpers_test.go b/test/helpers_test.go
new file mode 100644
index 0000000..19adf7f
--- /dev/null
+++ b/test/helpers_test.go
@@ -0,0 +1,36 @@
+package aztx_test
+
+import (
+	"fmt"
+	"path/filepath"
+	"reflect"
+	"runtime"
+	"testing"
+)
+
+// assert fails the test if the condition is false.
+func assert(tb testing.TB, condition bool, msg string, v ...interface{}) {
+	if !condition {
+		_, file, line, _ := runtime.Caller(1)
+		fmt.Printf("\033[31m%s:%d: "+msg+"\033[39m\n\n", append([]interface{}{filepath.Base(file), line}, v...)...)
+		tb.FailNow()
+	}
+}
+
+// ok fails the test if an err is not nil.
+func ok(tb testing.TB, err error) {
+	if err != nil {
+		_, file, line, _ := runtime.Caller(1)
+		fmt.Printf("\033[31m%s:%d: unexpected error: %s\033[39m\n\n", filepath.Base(file), line, err.Error())
+		tb.FailNow()
+	}
+}
+
+// equals fails the test if exp is not equal to act.
+func equals(tb testing.TB, exp interface{}, act interface{}) {
+	if !reflect.DeepEqual(exp, act) {
+		_, file, line, _ := runtime.Caller(1)
+		fmt.Printf("\033[31m%s:%d:\n\n\texp: %#v\n\n\tgot: %#v\033[39m\n\n", filepath.Base(file), line, exp, act)
+		tb.FailNow()
+	}
+}