diff --git a/cmd/argoexec/commands/emissary_test.go b/cmd/argoexec/commands/emissary_test.go
index 0f7b11d68da1..48261cb45e9c 100644
--- a/cmd/argoexec/commands/emissary_test.go
+++ b/cmd/argoexec/commands/emissary_test.go
@@ -41,21 +41,12 @@ func TestEmissary(t *testing.T) {
 		assert.Equal(t, "1", string(data))
 	})
 	t.Run("Stdout", func(t *testing.T) {
-		_ = os.Remove(varRunArgo + "/ctr/main/stdout")
 		err := run("echo hello")
 		assert.NoError(t, err)
 		data, err := ioutil.ReadFile(varRunArgo + "/ctr/main/stdout")
 		assert.NoError(t, err)
 		assert.Contains(t, string(data), "hello")
 	})
-	t.Run("Sub-process", func(t *testing.T) {
-		_ = os.Remove(varRunArgo + "/ctr/main/stdout")
-		err := run("(sleep 60; echo 'should not wait for sub-process')& echo -n hello")
-		assert.NoError(t, err)
-		data, err := os.ReadFile(varRunArgo + "/ctr/main/stdout")
-		assert.NoError(t, err)
-		assert.Equal(t, "hello", string(data))
-	})
 	t.Run("Combined", func(t *testing.T) {
 		err := run("echo hello > /dev/stderr")
 		assert.NoError(t, err)
diff --git a/workflow/executor/os-specific/command.go b/workflow/executor/os-specific/command.go
index 3e636babcd77..53ea1f2a42b0 100644
--- a/workflow/executor/os-specific/command.go
+++ b/workflow/executor/os-specific/command.go
@@ -4,7 +4,6 @@ import (
 	"io"
 	"os"
 	"os/exec"
-	"time"
 
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/term"
@@ -17,12 +16,7 @@ func simpleStart(cmd *exec.Cmd) (func(), error) {
 		return nil, err
 	}
 
-	closer := func() {
-		cmd.WaitDelay = 100 * time.Millisecond
-		_ = cmd.Wait()
-	}
-
-	return closer, nil
+	return func() {}, nil
 }
 
 func isTerminal(stdin io.Reader) bool {
diff --git a/workflow/executor/os-specific/command_test.go b/workflow/executor/os-specific/command_test.go
deleted file mode 100644
index 53b07d5da96f..000000000000
--- a/workflow/executor/os-specific/command_test.go
+++ /dev/null
@@ -1,47 +0,0 @@
-package os_specific
-
-import (
-	"bytes"
-	"io"
-	"os/exec"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestSimpleStartCloser(t *testing.T) {
-	cmd := exec.Command("sh", "-c", "echo -n A123456789B123456789C123456789D123456789E123456789")
-	var stdoutWriter bytes.Buffer
-	slowWriter := SlowWriter{
-		&stdoutWriter,
-	}
-	// Command outputs are asynchronously written to cmd.Stdout.
-	// Using SlowWriter causes the situation where the invoked command has exited but its outputs have not been written yet.
-	cmd.Stdout = slowWriter
-
-	closer, err := StartCommand(cmd)
-	assert.NoError(t, err)
-	err = cmd.Process.Release()
-	assert.NoError(t, err)
-	// Wait for echo command to exit before calling closer
-	time.Sleep(100 * time.Millisecond)
-	closer()
-
-	assert.Equal(t, "A123456789B123456789C123456789D123456789E123456789", stdoutWriter.String())
-}
-
-type SlowWriter struct {
-	Writer io.Writer
-}
-
-func (s SlowWriter) Write(data []byte) (n int, err error) {
-	for i := range data {
-		_, err := s.Writer.Write(data[i : i+1])
-		if err != nil {
-			return i, err
-		}
-		time.Sleep(7 * time.Millisecond)
-	}
-	return len(data), nil
-}