diff --git a/java/droidstubs_test.go b/java/droidstubs_test.go
index 10d99f3..5738217 100644
--- a/java/droidstubs_test.go
+++ b/java/droidstubs_test.go
@@ -21,6 +21,8 @@
 	"strings"
 	"testing"
 
+	"github.com/google/blueprint"
+
 	"android/soong/android"
 )
 
@@ -232,6 +234,30 @@
 	checkSystemModulesUseByDroidstubs(t, ctx, "stubs-prebuilt-system-modules", "prebuilt-jar.jar")
 }
 
+func TestAddJSONData(t *testing.T) {
+	prebuiltStubsSources := PrebuiltStubsSources{}
+	prebuiltStubsSources.jsonDataActions = []blueprint.JSONDataAction{
+		blueprint.JSONDataAction{
+			Inputs:  []string{},
+			Outputs: []string{},
+		},
+	}
+	jsonData := map[string]interface{}{}
+	prebuiltStubsSources.AddJSONData(&jsonData)
+	if fmt.Sprint(jsonData) != fmt.Sprint(
+		map[string]interface{}{
+			"Android": map[string]interface{}{},
+			"Actions": []map[string]interface{}{
+				map[string]interface{}{
+					"Inputs":  []string{},
+					"Outputs": []string{},
+				},
+			},
+		}) {
+		t.Errorf("The JSON data map isn't as expected %s.", jsonData)
+	}
+}
+
 func checkSystemModulesUseByDroidstubs(t *testing.T, ctx *android.TestContext, moduleName string, systemJar string) {
 	metalavaRule := ctx.ModuleForTests(moduleName, "android_common").Rule("metalava")
 	var systemJars []string