diff --git a/cli/exp_scaletest.go b/cli/exp_scaletest.go
index 3f5468635d934..fe455b9fbd4bf 100644
--- a/cli/exp_scaletest.go
+++ b/cli/exp_scaletest.go
@@ -14,7 +14,6 @@ import (
 	"strconv"
 	"strings"
 	"sync"
-	"syscall"
 	"time"
 
 	"github.com/google/uuid"
@@ -245,14 +244,8 @@ func (o *scaleTestOutput) write(res harness.Results, stdout io.Writer) error {
 
 	// Sync the file to disk if it's a file.
 	if s, ok := w.(interface{ Sync() error }); ok {
-		err := s.Sync()
-		// On Linux, EINVAL is returned when calling fsync on /dev/stdout. We
-		// can safely ignore this error.
-		// On macOS, ENOTTY is returned when calling sync on /dev/stdout. We
-		// can safely ignore this error.
-		if err != nil && !xerrors.Is(err, syscall.EINVAL) && !xerrors.Is(err, syscall.ENOTTY) {
-			return xerrors.Errorf("flush output file: %w", err)
-		}
+		// Best effort. If we get an error from syncing, just ignore it.
+		_ = s.Sync()
 	}
 
 	if c != nil {