diff --git a/pkg/kubelet/network/cni/cni_test.go b/pkg/kubelet/network/cni/cni_test.go
index e973309e4ba..4ca9f505c19 100644
--- a/pkg/kubelet/network/cni/cni_test.go
+++ b/pkg/kubelet/network/cni/cni_test.go
@@ -74,6 +74,8 @@ func installPluginUnderTest(t *testing.T, vendorName string, plugName string) {
 
 	const execScriptTempl = `#!/bin/bash
 read ignore
+env > {{.OutputEnv}}
+echo "%@" >> {{.OutputEnv}}
 export $(echo ${CNI_ARGS} | sed 's/;/ /g') &> /dev/null
 mkdir -p {{.OutputDir}} &> /dev/null
 echo -n "$CNI_COMMAND $CNI_NETNS $K8S_POD_NAMESPACE $K8S_POD_NAME $K8S_POD_INFRA_CONTAINER_ID" >& {{.OutputFile}}
@@ -81,6 +83,7 @@ echo -n "{ \"ip4\": { \"ip\": \"10.1.0.23/24\" } }"
 `
 	execTemplateData := &map[string]interface{}{
 		"OutputFile": path.Join(pluginDir, plugName+".out"),
+		"OutputEnv":  path.Join(pluginDir, plugName+".env"),
 		"OutputDir":  pluginDir,
 	}
 
@@ -179,7 +182,13 @@ func TestCNIPlugin(t *testing.T) {
 	if err != nil {
 		t.Errorf("Expected nil: %v", err)
 	}
-	output, err := ioutil.ReadFile(path.Join(testNetworkConfigPath, pluginName, pluginName+".out"))
+	outputEnv := path.Join(testNetworkConfigPath, pluginName, pluginName+".env")
+	eo, eerr := ioutil.ReadFile(outputEnv)
+	outputFile := path.Join(testNetworkConfigPath, pluginName, pluginName+".out")
+	output, err := ioutil.ReadFile(outputFile)
+	if err != nil {
+		t.Errorf("Failed to read output file %s: %v (env %s err %v)", outputFile, err, eo, eerr)
+	}
 	expectedOutput := "ADD /proc/12345/ns/net podNamespace podName dockerid2345"
 	if string(output) != expectedOutput {
 		t.Errorf("Mismatch in expected output for setup hook. Expected '%s', got '%s'", expectedOutput, string(output))