diff --git a/src/libDDO/DDO.ts b/src/libDDO/DDO.ts
index fb0c89f..e3d344b 100644
--- a/src/libDDO/DDO.ts
+++ b/src/libDDO/DDO.ts
@@ -33,7 +33,7 @@ export default class DDO {
     }
 
     public static signText(text: string, keyValue: string, signType: string): string {
-        const signature = ""
+        let signature = ""
         if ( signType === PublicKey.TYPE_RSA ) {
             const key = ursa.createPrivateKey(keyValue)
 //            console.log("privkey", keyValue, key.toPrivatePem("utf8"))
diff --git a/test/ddo_lib/DDO.test.ts b/test/ddo_lib/DDO.test.ts
index f9dc37c..2399a56 100644
--- a/test/ddo_lib/DDO.test.ts
+++ b/test/ddo_lib/DDO.test.ts
@@ -114,14 +114,8 @@ describe("libDDO", () => {
         it("should have a valid ddo proof", async () => {
             var ddo = new DDO(jsonDDO)
             assert(ddo)
-            assert(ddo.validate())
-            // TODO: currently the python proof signature is not the same as
-            // the validation signature for nodeJS
-            // FIXME: python does PKCS1_v1_5 padding, but this does not seem to be
-            // supported in ursa (only PKCS1_v1).
-            
-
-//            ddo.validateProof()
+            assert(ddo.validate())            
+            ddo.validateProof()
         })
     })