diff --git a/networking/build.gradle b/networking/build.gradle
index 0173eadc8..74fe4d0d2 100644
--- a/networking/build.gradle
+++ b/networking/build.gradle
@@ -41,6 +41,12 @@ dependencies {
   testAnnotationProcessor deps['com.google.dagger:dagger-compiler']
 }
 
+test {
+  // Temporarily allow non-CA cert as trust anchor (legacy behavior) in tests.
+  // TODO(weiminyu): generate test cert as a CA cert.
+  systemProperty 'jdk.security.allowNonCaAnchor', 'true'
+}
+
 // Make testing artifacts available to be depended up on by other projects.
 task testJar(type: Jar) {
   classifier = 'test'