diff --git a/src/kcm/accounts.cpp b/src/kcm/accounts.cpp
--- a/src/kcm/accounts.cpp
+++ b/src/kcm/accounts.cpp
@@ -29,9 +29,9 @@
 AccountsSettings::AccountsSettings(QObject* parent, const QVariantList& args)
     : KQuickAddons::ConfigModule(parent, args)
 {
-    KAboutData* about = new KAboutData("kcm_kaccounts", i18n("Accounts"),
-                                       "1.0", QString(), KAboutLicense::LGPL);
-    about->addAuthor(i18n("Sebastian Kügler"), QString(), "sebas@kde.org");
+    KAboutData* about = new KAboutData(QStringLiteral("kcm_kaccounts"), i18n("Accounts"),
+                                       QStringLiteral("1.0"), QString(), KAboutLicense::LGPL);
+    about->addAuthor(i18n("Sebastian Kügler"), QString(), QStringLiteral("sebas@kde.org"));
     setAboutData(about);
 }
 
diff --git a/src/lib/createaccountjob.cpp b/src/lib/createaccountjob.cpp
--- a/src/lib/createaccountjob.cpp
+++ b/src/lib/createaccountjob.cpp
@@ -73,7 +73,7 @@
     } else {
         SignOn::IdentityInfo info;
         info.setCaption(m_providerName);
-        info.setAccessControlList(QStringList("*"));
+        info.setAccessControlList({QStringLiteral("*")});
         info.setType(SignOn::IdentityInfo::Application);
         info.setStoreSecret(true);
 
@@ -86,7 +86,7 @@
         });
 
         QVariantMap data = m_accInfo->authData().parameters();
-        data.insert("Embedded", false);
+        data.insert(QStringLiteral("Embedded"), false);
 
         SignOn::SessionData sessionData(data);
         SignOn::AuthSessionP session = m_identity->createSession(m_accInfo->authData().method());
@@ -183,18 +183,18 @@
     if (m_account->displayName().isEmpty()) {
         m_account->setDisplayName(info.userName());
     }
-    m_account->setValue("username", info.userName());
+    m_account->setValue(QStringLiteral("username"), info.userName());
     m_account->setCredentialsId(info.id());
 
     Accounts::AuthData authData = m_accInfo->authData();
-    m_account->setValue("auth/mechanism", authData.mechanism());
-    m_account->setValue("auth/method", authData.method());
+    m_account->setValue(QStringLiteral("auth/mechanism"), authData.mechanism());
+    m_account->setValue(QStringLiteral("auth/method"), authData.method());
 
-    QString base("auth/");
+    QString base = QStringLiteral("auth/");
     base.append(authData.method());
-    base.append("/");
+    base.append(QLatin1Char('/'));
     base.append(authData.mechanism());
-    base.append("/");
+    base.append(QLatin1Char('/'));
 
     QVariantMap data = authData.parameters();
     QMapIterator<QString, QVariant> i(data);
diff --git a/src/lib/getcredentialsjob.cpp b/src/lib/getcredentialsjob.cpp
--- a/src/lib/getcredentialsjob.cpp
+++ b/src/lib/getcredentialsjob.cpp
@@ -81,7 +81,7 @@
         return;
     }
 
-    authData["AccountUsername"] = acc->value(QLatin1String("username")).toString();
+    authData[QStringLiteral("AccountUsername")] = acc->value(QLatin1String("username")).toString();
     QPointer<SignOn::AuthSession> authSession = identity->createSession(authMethod.isEmpty() ? serviceAuthData.method() : authMethod);
     if (!authSession) {
         qWarning() << "Unable to create auth session for" << authMethod << serviceAuthData.method();
diff --git a/src/lib/uipluginsmanager.cpp b/src/lib/uipluginsmanager.cpp
--- a/src/lib/uipluginsmanager.cpp
+++ b/src/lib/uipluginsmanager.cpp
@@ -133,7 +133,7 @@
         s_instance->loadPlugins();
     }
 
-    return s_instance->pluginsForNames.value(name + ".so");
+    return s_instance->pluginsForNames.value(name + QStringLiteral(".so"));
 }
 
 KAccountsUiPlugin* UiPluginsManager::pluginForService(const QString &service)