diff --git a/tests/TestKdbx4.cpp b/tests/TestKdbx4.cpp
index 26937540a..8fb0f219b 100644
--- a/tests/TestKdbx4.cpp
+++ b/tests/TestKdbx4.cpp
@@ -188,73 +188,3 @@ void TestKdbx4::testFormat400Upgrade_data()
     QTest::newRow("AES-KDF          + Twofish")  << KeePass2::KDF_AES_KDBX4 << KeePass2::CIPHER_TWOFISH  << kdbx4;
     QTest::newRow("AES-KDF (legacy) + Twofish")  << KeePass2::KDF_AES_KDBX3 << KeePass2::CIPHER_TWOFISH  << kdbx3;
 }
-
-/**
- * Test for catching mapping errors with duplicate attachments.
- */
-void TestKdbx4::testDuplicateAttachments()
-{
-    QScopedPointer<Database> db(new Database());
-    db->setKey(CompositeKey());
-    db->setKdf(KeePass2::uuidToKdf(KeePass2::KDF_ARGON2));
-
-    const QByteArray attachment1("abc");
-    const QByteArray attachment2("def");
-    const QByteArray attachment3("ghi");
-
-    auto entry1 = new Entry();
-    entry1->setGroup(db->rootGroup());
-    entry1->setUuid(Uuid("aaaaaaaaaaaaaaaa"));
-    entry1->attachments()->set("a", attachment1);
-
-    auto entry2 = new Entry();
-    entry2->setGroup(db->rootGroup());
-    entry2->setUuid(Uuid("bbbbbbbbbbbbbbbb"));
-    entry2->attachments()->set("b1", attachment1);
-    entry2->beginUpdate();
-    entry2->attachments()->set("b2", attachment1);
-    entry2->endUpdate();
-    entry2->beginUpdate();
-    entry2->attachments()->set("b3", attachment2);
-    entry2->endUpdate();
-    entry2->beginUpdate();
-    entry2->attachments()->set("b4", attachment2);
-    entry2->endUpdate();
-
-    auto entry3 = new Entry();
-    entry3->setGroup(db->rootGroup());
-    entry3->setUuid(Uuid("cccccccccccccccc"));
-    entry3->attachments()->set("c1", attachment2);
-    entry3->attachments()->set("c2", attachment2);
-    entry3->attachments()->set("c3", attachment3);
-
-    QBuffer buffer;
-    buffer.open(QBuffer::ReadWrite);
-
-    KeePass2Writer writer;
-    writer.writeDatabase(&buffer, db.data());
-    if (writer.hasError()) {
-        QFAIL(qPrintable(QString("Error while writing database: %1").arg(writer.errorString())));
-    }
-
-    buffer.seek(0);
-    KeePass2Reader reader;
-    db.reset(reader.readDatabase(&buffer, CompositeKey()));
-    if (reader.hasError()) {
-        QFAIL(qPrintable(QString("Error while reading database: %1").arg(reader.errorString())));
-    }
-
-    QCOMPARE(db->rootGroup()->entries()[0]->attachments()->value("a"), attachment1);
-
-    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b1"), attachment1);
-    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b2"), attachment1);
-    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b3"), attachment2);
-    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b4"), attachment2);
-    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[0]->attachments()->value("b1"), attachment1);
-    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[1]->attachments()->value("b2"), attachment1);
-    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[2]->attachments()->value("b3"), attachment2);
-
-    QCOMPARE(db->rootGroup()->entries()[2]->attachments()->value("c1"), attachment2);
-    QCOMPARE(db->rootGroup()->entries()[2]->attachments()->value("c2"), attachment2);
-    QCOMPARE(db->rootGroup()->entries()[2]->attachments()->value("c3"), attachment3);
-}
diff --git a/tests/TestKdbx4.h b/tests/TestKdbx4.h
index ceceefcb7..59864b70e 100644
--- a/tests/TestKdbx4.h
+++ b/tests/TestKdbx4.h
@@ -28,7 +28,6 @@ private slots:
     void testFormat400();
     void testFormat400Upgrade();
     void testFormat400Upgrade_data();
-    void testDuplicateAttachments();
 
 protected:
     void initTestCaseImpl() override;
diff --git a/tests/TestKeePass2Format.cpp b/tests/TestKeePass2Format.cpp
index 34daea879..790f0d802 100644
--- a/tests/TestKeePass2Format.cpp
+++ b/tests/TestKeePass2Format.cpp
@@ -565,3 +565,75 @@ void TestKeePass2Format::testKdbxDeviceFailure()
     QVERIFY(hasError);
     QCOMPARE(errorString, QString("FAILDEVICE"));
 }
+
+/**
+ * Test for catching mapping errors with duplicate attachments.
+ */
+void TestKeePass2Format::testDuplicateAttachments()
+{
+    QScopedPointer<Database> db(new Database());
+    db->setKey(CompositeKey());
+
+    const QByteArray attachment1("abc");
+    const QByteArray attachment2("def");
+    const QByteArray attachment3("ghi");
+
+    auto entry1 = new Entry();
+    entry1->setGroup(db->rootGroup());
+    entry1->setUuid(Uuid("aaaaaaaaaaaaaaaa"));
+    entry1->attachments()->set("a", attachment1);
+
+    auto entry2 = new Entry();
+    entry2->setGroup(db->rootGroup());
+    entry2->setUuid(Uuid("bbbbbbbbbbbbbbbb"));
+    entry2->attachments()->set("b1", attachment1);
+    entry2->beginUpdate();
+    entry2->attachments()->set("b2", attachment1);
+    entry2->endUpdate();
+    entry2->beginUpdate();
+    entry2->attachments()->set("b3", attachment2);
+    entry2->endUpdate();
+    entry2->beginUpdate();
+    entry2->attachments()->set("b4", attachment2);
+    entry2->endUpdate();
+
+    auto entry3 = new Entry();
+    entry3->setGroup(db->rootGroup());
+    entry3->setUuid(Uuid("cccccccccccccccc"));
+    entry3->attachments()->set("c1", attachment2);
+    entry3->attachments()->set("c2", attachment2);
+    entry3->attachments()->set("c3", attachment3);
+
+    QBuffer buffer;
+    buffer.open(QBuffer::ReadWrite);
+
+    bool hasError = false;
+    QString errorString;
+    writeKdbx(&buffer, db.data(), hasError, errorString);
+    if (hasError) {
+        QFAIL(qPrintable(QString("Error while writing database: %1").arg(errorString)));
+    }
+
+    buffer.seek(0);
+    readKdbx(&buffer, CompositeKey(), db, hasError, errorString);
+    if (hasError) {
+        QFAIL(qPrintable(QString("Error while reading database: %1").arg(errorString)));
+    }
+
+    QCOMPARE(db->rootGroup()->entries()[0]->attachments()->value("a"), attachment1);
+
+    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b1"), attachment1);
+    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b2"), attachment1);
+    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b3"), attachment2);
+    QCOMPARE(db->rootGroup()->entries()[1]->attachments()->value("b4"), attachment2);
+    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[0]->attachments()->value("b1"), attachment1);
+    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[1]->attachments()->value("b1"), attachment1);
+    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[1]->attachments()->value("b2"), attachment1);
+    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[2]->attachments()->value("b1"), attachment1);
+    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[2]->attachments()->value("b2"), attachment1);
+    QCOMPARE(db->rootGroup()->entries()[1]->historyItems()[2]->attachments()->value("b3"), attachment2);
+
+    QCOMPARE(db->rootGroup()->entries()[2]->attachments()->value("c1"), attachment2);
+    QCOMPARE(db->rootGroup()->entries()[2]->attachments()->value("c2"), attachment2);
+    QCOMPARE(db->rootGroup()->entries()[2]->attachments()->value("c3"), attachment3);
+}
diff --git a/tests/TestKeePass2Format.h b/tests/TestKeePass2Format.h
index a2bdd4f49..2a30d92b2 100644
--- a/tests/TestKeePass2Format.h
+++ b/tests/TestKeePass2Format.h
@@ -63,6 +63,7 @@ private slots:
     void testKdbxAttachments();
     void testKdbxNonAsciiPasswords();
     void testKdbxDeviceFailure();
+    void testDuplicateAttachments();
 
 protected:
     virtual void initTestCaseImpl() = 0;