diff --git a/java/java_test.go b/java/java_test.go
index 17921ca..9c5680b 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -57,7 +57,13 @@
 }
 
 func testConfig(env map[string]string, bp string, fs map[string][]byte) android.Config {
-	return TestConfig(buildDir, env, bp, fs)
+	config := TestConfig(buildDir, env, bp, fs)
+
+	// Set up the global Once cache used for dexpreopt.GlobalSoongConfig, so that
+	// it doesn't create a real one, which would fail.
+	_ = dexpreopt.GlobalSoongConfigForTests(config)
+
+	return config
 }
 
 func testContext() *android.TestContext {