diff --git a/include/orm/tiny/concerns/hasrelationships.hpp b/include/orm/tiny/concerns/hasrelationships.hpp
index e9dc9284e..188626367 100644
--- a/include/orm/tiny/concerns/hasrelationships.hpp
+++ b/include/orm/tiny/concerns/hasrelationships.hpp
@@ -984,7 +984,7 @@ namespace Concerns
     QString
     HasRelationships<Derived, AllRelations...>::guessBelongsToRelation() const
     {
-        static const QString relation = guessBelongsToRelationInternal<Related>();
+        static const auto relation = guessBelongsToRelationInternal<Related>();
 
         /* validateUserRelation() method call can not be cached, has to be called
            every time, to correctly inform the user about invalid relation name. */
@@ -1000,8 +1000,8 @@ namespace Concerns
     QString
     HasRelationships<Derived, AllRelations...>::guessBelongsToManyRelation() const
     {
-        static const QString relation = TMPL_PLURAL
-                                        .arg(guessBelongsToRelationInternal<Related>());
+        static const auto relation = TMPL_PLURAL
+                                     .arg(guessBelongsToRelationInternal<Related>());
 
         /* validateUserRelation() method call can not be cached, has to be called
            every time, to correctly inform the user about invalid relation name. */
diff --git a/include/orm/tiny/types/syncchanges.hpp b/include/orm/tiny/types/syncchanges.hpp
index d04fdd408..7b5886b4d 100644
--- a/include/orm/tiny/types/syncchanges.hpp
+++ b/include/orm/tiny/types/syncchanges.hpp
@@ -23,9 +23,9 @@ namespace Orm
 
 namespace Constants
 {
-    inline const QString Attached = QStringLiteral("attached");
-    inline const QString Detached = QStringLiteral("detached");
-    inline const QString Updated_ = QStringLiteral("updated");
+    inline const auto Attached = QStringLiteral("attached");
+    inline const auto Detached = QStringLiteral("detached");
+    inline const auto Updated_ = QStringLiteral("updated");
 } // namespace Constants
 
 namespace Tiny
diff --git a/tests/auto/functional/others/versions/tst_versions.cpp b/tests/auto/functional/others/versions/tst_versions.cpp
index c0256e217..906338fb0 100644
--- a/tests/auto/functional/others/versions/tst_versions.cpp
+++ b/tests/auto/functional/others/versions/tst_versions.cpp
@@ -350,10 +350,10 @@ void tst_Versions::checkFileVersion_TinyDrivers() const
 #  pragma warning(push)
 #  pragma warning(disable : 4127)
 #endif
-    const QString versionStr = QString::number(TINYDRIVERS_VERSION_MAJOR)  + DOT +
-                               QString::number(TINYDRIVERS_VERSION_MINOR)  + DOT +
-                               QString::number(TINYDRIVERS_VERSION_BUGFIX) + DOT +
-                               QString::number(TINYDRIVERS_VERSION_BUILD);
+    const auto versionStr = QString::number(TINYDRIVERS_VERSION_MAJOR)  + DOT +
+                            QString::number(TINYDRIVERS_VERSION_MINOR)  + DOT +
+                            QString::number(TINYDRIVERS_VERSION_BUGFIX) + DOT +
+                            QString::number(TINYDRIVERS_VERSION_BUILD);
 #if defined(_MSC_VER) && !defined(__clang__)
 #  pragma warning(pop)
 #endif
@@ -381,10 +381,10 @@ void tst_Versions::checkFileVersion_TinyMySql() const
 #  pragma warning(push)
 #  pragma warning(disable : 4127)
 #endif
-    const QString versionStr = QString::number(TINYMYSQL_VERSION_MAJOR)  + DOT +
-                               QString::number(TINYMYSQL_VERSION_MINOR)  + DOT +
-                               QString::number(TINYMYSQL_VERSION_BUGFIX) + DOT +
-                               QString::number(TINYMYSQL_VERSION_BUILD);
+    const auto versionStr = QString::number(TINYMYSQL_VERSION_MAJOR)  + DOT +
+                            QString::number(TINYMYSQL_VERSION_MINOR)  + DOT +
+                            QString::number(TINYMYSQL_VERSION_BUGFIX) + DOT +
+                            QString::number(TINYMYSQL_VERSION_BUILD);
 #if defined(_MSC_VER) && !defined(__clang__)
 #  pragma warning(pop)
 #endif
@@ -411,10 +411,10 @@ void tst_Versions::checkFileVersion_TinyOrm() const
 #  pragma warning(push)
 #  pragma warning(disable : 4127)
 #endif
-    const QString versionStr = QString::number(TINYORM_VERSION_MAJOR)  + DOT +
-                               QString::number(TINYORM_VERSION_MINOR)  + DOT +
-                               QString::number(TINYORM_VERSION_BUGFIX) + DOT +
-                               QString::number(TINYORM_VERSION_BUILD);
+    const auto versionStr = QString::number(TINYORM_VERSION_MAJOR)  + DOT +
+                            QString::number(TINYORM_VERSION_MINOR)  + DOT +
+                            QString::number(TINYORM_VERSION_BUGFIX) + DOT +
+                            QString::number(TINYORM_VERSION_BUILD);
 #if defined(_MSC_VER) && !defined(__clang__)
 #  pragma warning(pop)
 #endif
@@ -436,10 +436,10 @@ void tst_Versions::checkFileVersion_TinyUtils() const
                                   Fs::absolutePath(TINYTEST_VERSIONS_TINYUTILS_PATH));
 
     // Project and File Version strings
-    const QString versionStr = QString::number(TINYUTILS_VERSION_MAJOR)  + DOT +
-                               QString::number(TINYUTILS_VERSION_MINOR)  + DOT +
-                               QString::number(TINYUTILS_VERSION_BUGFIX) + DOT +
-                               QString::number(TINYUTILS_VERSION_BUILD);
+    const auto versionStr = QString::number(TINYUTILS_VERSION_MAJOR)  + DOT +
+                            QString::number(TINYUTILS_VERSION_MINOR)  + DOT +
+                            QString::number(TINYUTILS_VERSION_BUGFIX) + DOT +
+                            QString::number(TINYUTILS_VERSION_BUILD);
 
     QCOMPARE(fileVersions.productVersion, versionStr);
     QCOMPARE(fileVersions.fileVersion, fileVersions.productVersion);
@@ -459,10 +459,10 @@ void tst_Versions::checkFileVersion_TomExample() const
                                   Fs::absolutePath(TINYTEST_VERSIONS_TOMEXAMPLE_PATH));
 
     // Project and File Version strings
-    const QString versionStr = QString::number(TINYTOM_VERSION_MAJOR)  + DOT +
-                               QString::number(TINYTOM_VERSION_MINOR)  + DOT +
-                               QString::number(TINYTOM_VERSION_BUGFIX) + DOT +
-                               QString::number(TINYTOM_VERSION_BUILD);
+    const auto versionStr = QString::number(TINYTOM_VERSION_MAJOR)  + DOT +
+                            QString::number(TINYTOM_VERSION_MINOR)  + DOT +
+                            QString::number(TINYTOM_VERSION_BUGFIX) + DOT +
+                            QString::number(TINYTOM_VERSION_BUILD);
 
     QCOMPARE(fileVersions.productVersion, versionStr);
     QCOMPARE(fileVersions.fileVersion, fileVersions.productVersion);
diff --git a/tom/include/tom/migration.hpp b/tom/include/tom/migration.hpp
index 0aa943871..9ad305c22 100644
--- a/tom/include/tom/migration.hpp
+++ b/tom/include/tom/migration.hpp
@@ -13,7 +13,7 @@ TINY_SYSTEM_HEADER
     the filepath part). */
 #define T_MIGRATION                                                                 \
     /*! Filename of the migration file. */                                          \
-    inline static const QString FileName = []                                       \
+    inline static const auto FileName = []                                          \
     {                                                                               \
         return QString::fromStdString(                                              \
                     std::filesystem::path(__FILE__).stem().string());               \