diff --git a/pkg/commands/os.go b/pkg/commands/os.go
index fd27d39da..c3574f98e 100644
--- a/pkg/commands/os.go
+++ b/pkg/commands/os.go
@@ -80,8 +80,7 @@ func (c *OSCommand) RunDirectCommand(command string) (string, error) {
 	c.Log.WithField("command", command).Info("RunDirectCommand")
 
 	return sanitisedCommandOutput(
-		exec.
-			Command(c.Platform.shell, c.Platform.shellArg, command).
+		c.command(c.Platform.shell, c.Platform.shellArg, command).
 			CombinedOutput(),
 	)
 }
diff --git a/pkg/commands/os_test.go b/pkg/commands/os_test.go
index a7ccef560..21d72dc67 100644
--- a/pkg/commands/os_test.go
+++ b/pkg/commands/os_test.go
@@ -5,11 +5,28 @@ import (
 	"os/exec"
 	"testing"
 
+	"github.com/jesseduffield/lazygit/pkg/config"
+	"github.com/spf13/viper"
 	"github.com/stretchr/testify/assert"
+	yaml "gopkg.in/yaml.v2"
 )
 
 func newDummyOSCommand() *OSCommand {
-	return NewOSCommand(newDummyLog())
+	return NewOSCommand(newDummyLog(), newDummyAppConfig())
+}
+
+func newDummyAppConfig() *config.AppConfig {
+	appConfig := &config.AppConfig{
+		Name:        "lazygit",
+		Version:     "unversioned",
+		Commit:      "",
+		BuildDate:   "",
+		Debug:       false,
+		BuildSource: "",
+		UserConfig:  viper.New(),
+	}
+	_ = yaml.Unmarshal([]byte{}, appConfig.AppState)
+	return appConfig
 }
 
 func TestOSCommandRunCommandWithOutput(t *testing.T) {
@@ -60,39 +77,43 @@ func TestOSCommandRunCommand(t *testing.T) {
 }
 
 func TestOSCommandGetOpenCommand(t *testing.T) {
+	// two scenarios to test. One with a config set, the other with the platform default
+
 	type scenario struct {
-		command func(string, ...string) *exec.Cmd
-		test    func(string, string, error)
+		before func(*OSCommand)
+		test   func(string)
 	}
 
 	scenarios := []scenario{
 		{
-			func(name string, arg ...string) *exec.Cmd {
-				return exec.Command("exit", "1")
-			},
-			func(name string, trail string, err error) {
-				assert.EqualError(t, err, "Unsure what command to use to open this file")
+			func(OSCmd *OSCommand) {},
+			func(command string) {
+				assert.Equal(t, command, "open {{filename}}")
 			},
 		},
 		{
-			func(name string, arg ...string) *exec.Cmd {
-				assert.Equal(t, "which", name)
-				assert.Len(t, arg, 1)
-				assert.Regexp(t, "xdg-open|cygstart|open", arg[0])
-				return exec.Command("echo")
+			func(OSCmd *OSCommand) {
+				OSCmd.Config.GetUserConfig().Set("os.openCommand", "test {{filename}}")
 			},
-			func(name string, trail string, err error) {
-				assert.NoError(t, err)
-				assert.Regexp(t, "xdg-open|cygstart|open", name)
-				assert.Regexp(t, " \\&\\>/dev/null \\&|", trail)
+			func(command string) {
+				assert.Equal(t, command, "test {{filename}}")
+			},
+		},
+		{
+			func(OSCmd *OSCommand) {
+				OSCmd.Platform = &Platform{
+					openCommand: "platform specific open {{filename}}",
+				}
+			},
+			func(command string) {
+				assert.Equal(t, command, "platform specific open {{filename}}")
 			},
 		},
 	}
 
 	for _, s := range scenarios {
 		OSCmd := newDummyOSCommand()
-		OSCmd.command = s.command
-
+		s.before(OSCmd)
 		s.test(OSCmd.getOpenCommand())
 	}
 }
@@ -111,29 +132,14 @@ func TestOSCommandOpenFile(t *testing.T) {
 				return exec.Command("exit", "1")
 			},
 			func(err error) {
-				assert.EqualError(t, err, "Unsure what command to use to open this file")
+				assert.Error(t, err)
 			},
 		},
 		{
 			"test",
 			func(name string, arg ...string) *exec.Cmd {
-				if name == "which" {
-					return exec.Command("echo")
-				}
-
-				switch len(arg) {
-				case 1:
-					assert.Regexp(t, "open|cygstart", name)
-					assert.EqualValues(t, "test", arg[0])
-				case 3:
-					assert.Equal(t, "xdg-open", name)
-					assert.EqualValues(t, "test", arg[0])
-					assert.Regexp(t, " \\&\\>/dev/null \\&|", arg[1])
-					assert.EqualValues(t, "&", arg[2])
-				default:
-					assert.Fail(t, "Unexisting command given")
-				}
-
+				assert.Equal(t, name, "bash")
+				assert.Equal(t, arg, []string{"-c", "open \"test\""})
 				return exec.Command("echo")
 			},
 			func(err error) {