diff --git a/cmd.go b/cmd.go
index 6b898b5..4b7e5ba 100644
--- a/cmd.go
+++ b/cmd.go
@@ -5,7 +5,6 @@ package cmd
 import (
 	"bufio"
 	"bytes"
-	"errors"
 	"os/exec"
 	"sync"
 	"syscall"
@@ -211,16 +210,11 @@ func (c *Cmd) run() {
 	signaled := false
 	if err != nil {
 		if exiterr, ok := err.(*exec.ExitError); ok {
-			err = nil // exec.ExitError isn't a standard error
-
 			if waitStatus, ok := exiterr.Sys().(syscall.WaitStatus); ok {
 				exitCode = waitStatus.ExitStatus() // -1 if signaled
 
-				// If the command was terminated by a signal, then exiterr.Error()
-				// is a string like "signal: terminated".
 				if waitStatus.Signaled() {
 					signaled = true
-					err = errors.New(exiterr.Error())
 				}
 			}
 		}
diff --git a/cmd_test.go b/cmd_test.go
index 6e49e37..e26ee83 100644
--- a/cmd_test.go
+++ b/cmd_test.go
@@ -55,7 +55,7 @@ func TestCmdNonzeroExit(t *testing.T) {
 		PID:      gotStatus.PID, // nondeterministic
 		Complete: true,
 		Exit:     1,
-		Error:    nil,
+		Error:    errors.New("exit status 1"),
 		Runtime:  gotStatus.Runtime, // nondeterministic
 		Stdout:   []string{},
 		Stderr:   []string{},