diff --git a/fuseutil/file_system.go b/fuseutil/file_system.go
index 7951ffa..7aa1b45 100644
--- a/fuseutil/file_system.go
+++ b/fuseutil/file_system.go
@@ -15,20 +15,13 @@
 package fuseutil
 
 import (
-	"flag"
 	"io"
-	"math/rand"
 	"sync"
-	"time"
 
 	"github.com/jacobsa/fuse"
 	"github.com/jacobsa/fuse/fuseops"
 )
 
-var fRandomDelays = flag.Bool(
-	"fuseutil.random_delays", false,
-	"If set, randomly delay each op received, to help expose concurrency issues.")
-
 // An interface with a method for each op type in the fuseops package. This can
 // be used in conjunction with NewFileSystemServer to avoid writing a "dispatch
 // loop" that switches on op types, instead receiving typed method calls
@@ -115,13 +108,6 @@ func (s *fileSystemServer) ServeOps(c *fuse.Connection) {
 func (s *fileSystemServer) handleOp(op fuseops.Op) {
 	defer s.opsInFlight.Done()
 
-	// Delay if requested.
-	if *fRandomDelays {
-		const delayLimit = 100 * time.Microsecond
-		delay := time.Duration(rand.Int63n(int64(delayLimit)))
-		time.Sleep(delay)
-	}
-
 	// Dispatch to the appropriate method.
 	var err error
 	switch typed := op.(type) {