diff --git a/tests/signed.plasmoid.invalid.sig b/tests/signed.plasmoid.invalid.sig
new file mode 100644
index 000000000..9e41a819b
Binary files /dev/null and b/tests/signed.plasmoid.invalid.sig differ
diff --git a/tests/signingtest.cpp b/tests/signingtest.cpp
index 338295989..40231b4fd 100644
--- a/tests/signingtest.cpp
+++ b/tests/signingtest.cpp
@@ -23,15 +23,18 @@
 
 #include <kdebug.h>
 
+#include "plasma/applet.h"
 #include "plasma/remote/signing.h"
 
 SigningTest::SigningTest(QObject *parent)
     : QObject(parent),
-      m_signing(0)
+      m_signing(0),
+      m_package(QString::fromLatin1(KDESRCDIR) + "signedPackage", Plasma::Applet::packageStructure())
 {
     const QString prefix = QString::fromLatin1(KDESRCDIR);
-    m_package = prefix + "signed.plasmoid";
-    m_packageSig = prefix + "signed.plasmoid.asc";
+    m_path = prefix + "signed.plasmoid";
+    m_sig = prefix + "signed.plasmoid.asc";
+    m_invalidSig = prefix + "signed.plasmoid.invalid.sig";
 }
 
 void SigningTest::init()
@@ -53,18 +56,27 @@ void SigningTest::confirmCtorPerformance()
 void SigningTest::missingFiles()
 {
     QVERIFY(m_signing->signerOf(KUrl("/nonexistantpackage"), KUrl("/noneexistantsignature")).isEmpty());
-    QVERIFY(m_signing->signerOf(KUrl(m_package), KUrl("/noneexistantsignature")).isEmpty());
-    QVERIFY(m_signing->signerOf(KUrl("/nonexistantpackage"), KUrl(m_packageSig)).isEmpty());
+    QVERIFY(m_signing->signerOf(KUrl(m_path), KUrl("/noneexistantsignature")).isEmpty());
+    QVERIFY(m_signing->signerOf(KUrl("/nonexistantpackage"), KUrl(m_sig)).isEmpty());
+}
+
+void SigningTest::invalidSignature()
+{
+    QVERIFY(m_signing->signerOf(m_path, m_invalidSig).isEmpty());
 }
 
 void SigningTest::validSignature()
 {
-    QVERIFY(!m_signing->signerOf(m_package, m_packageSig).isEmpty());
+    QVERIFY(!m_signing->signerOf(m_path, m_sig).isEmpty());
 }
 
 void SigningTest::validSignatureWithoutDefinedSigFile()
 {
-    QVERIFY(!m_signing->signerOf(m_package).isEmpty());
+    QVERIFY(!m_signing->signerOf(m_path).isEmpty());
+}
+
+void SigningTest::validPackage()
+{
 }
 
 void SigningTest::confirmDtorPerformance()
diff --git a/tests/signingtest.h b/tests/signingtest.h
index 539b20a28..eaaefe316 100644
--- a/tests/signingtest.h
+++ b/tests/signingtest.h
@@ -21,11 +21,14 @@
 
 #include <qtest_kde.h>
 
+#include "plasma/package.h"
+
 namespace Plasma
 {
     class Signing;
 }
 
+
 class SigningTest : public QObject
 {
     Q_OBJECT
@@ -39,14 +42,18 @@ public Q_SLOTS:
 private Q_SLOTS:
     void confirmCtorPerformance();
     void missingFiles();
+    void invalidSignature();
     void validSignature();
     void validSignatureWithoutDefinedSigFile();
+    void validPackage();
     void confirmDtorPerformance();
 
 private:
     Plasma::Signing *m_signing;
-    QString m_package;
-    QString m_packageSig;
+    Plasma::Package m_package;
+    QString m_path;
+    QString m_sig;
+    QString m_invalidSig;
 };
 
 #endif