diff --git a/libcontainer/integration/exec_test.go b/libcontainer/integration/exec_test.go
index e1f209008..cd0df282b 100644
--- a/libcontainer/integration/exec_test.go
+++ b/libcontainer/integration/exec_test.go
@@ -784,6 +784,7 @@ func TestPassExtraFiles(t *testing.T) {
 		ExtraFiles: []*os.File{pipein1, pipein2},
 		Stdin:      nil,
 		Stdout:     &stdout,
+		Stderr:     new(strings.Builder),
 		Init:       true,
 	}
 	err = container.Run(&process)
diff --git a/libcontainer/integration/execin_test.go b/libcontainer/integration/execin_test.go
index 707d842c1..eaf6144e3 100644
--- a/libcontainer/integration/execin_test.go
+++ b/libcontainer/integration/execin_test.go
@@ -421,6 +421,7 @@ func TestExecinPassExtraFiles(t *testing.T) {
 		ExtraFiles: []*os.File{pipein1, pipein2},
 		Stdin:      nil,
 		Stdout:     &stdout,
+		Stderr:     new(strings.Builder),
 	}
 	err = container.Run(inprocess)
 	ok(t, err)