diff --git a/cmd/argoexec/commands/emissary_test.go b/cmd/argoexec/commands/emissary_test.go
index 78cc0be041cc..3b5e199b77f2 100644
--- a/cmd/argoexec/commands/emissary_test.go
+++ b/cmd/argoexec/commands/emissary_test.go
@@ -49,7 +49,7 @@ func TestEmissary(t *testing.T) {
 	})
 	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")
+		err := run(`(sleep 60; echo 'should not wait for sub-process')& echo "hello\c"`)
 		assert.NoError(t, err)
 		data, err := os.ReadFile(varRunArgo + "/ctr/main/stdout")
 		assert.NoError(t, err)
diff --git a/workflow/executor/os-specific/command_test.go b/workflow/executor/os-specific/command_test.go
index 53b07d5da96f..f247ac047f0f 100644
--- a/workflow/executor/os-specific/command_test.go
+++ b/workflow/executor/os-specific/command_test.go
@@ -11,7 +11,7 @@ import (
 )
 
 func TestSimpleStartCloser(t *testing.T) {
-	cmd := exec.Command("sh", "-c", "echo -n A123456789B123456789C123456789D123456789E123456789")
+	cmd := exec.Command("sh", "-c", `echo "A123456789B123456789C123456789D123456789E123456789\c"`)
 	var stdoutWriter bytes.Buffer
 	slowWriter := SlowWriter{
 		&stdoutWriter,