diff --git a/src/libs/utils/async.h b/src/libs/utils/async.h
index 8c7155bc131..c3caec5d3ad 100644
--- a/src/libs/utils/async.h
+++ b/src/libs/utils/async.h
@@ -202,7 +202,7 @@ private:
 };
 
 template <typename ResultType>
-class AsyncTaskAdapter : public Tasking::TaskAdapter<Async<ResultType>>
+class AsyncTaskAdapter final : public Tasking::TaskAdapter<Async<ResultType>>
 {
 public:
     AsyncTaskAdapter() {
diff --git a/src/libs/utils/filestreamer.h b/src/libs/utils/filestreamer.h
index 8f569ff4363..ae7ad3d1bd8 100644
--- a/src/libs/utils/filestreamer.h
+++ b/src/libs/utils/filestreamer.h
@@ -48,7 +48,7 @@ private:
     class FileStreamerPrivate *d = nullptr;
 };
 
-class FileStreamerTaskAdapter : public Tasking::TaskAdapter<FileStreamer>
+class FileStreamerTaskAdapter final : public Tasking::TaskAdapter<FileStreamer>
 {
 public:
     FileStreamerTaskAdapter() {
diff --git a/src/libs/utils/qtcprocess.h b/src/libs/utils/qtcprocess.h
index cc629fe127b..2182f5bf35b 100644
--- a/src/libs/utils/qtcprocess.h
+++ b/src/libs/utils/qtcprocess.h
@@ -213,7 +213,7 @@ public:
     std::function<ProcessInterface *(const FilePath &)> processImplHook;
 };
 
-class QTCREATOR_UTILS_EXPORT ProcessTaskAdapter : public Tasking::TaskAdapter<Process>
+class QTCREATOR_UTILS_EXPORT ProcessTaskAdapter final : public Tasking::TaskAdapter<Process>
 {
 public:
     ProcessTaskAdapter();
diff --git a/src/libs/utils/unarchiver.h b/src/libs/utils/unarchiver.h
index 23fcad07a81..cdafe4ca700 100644
--- a/src/libs/utils/unarchiver.h
+++ b/src/libs/utils/unarchiver.h
@@ -49,7 +49,7 @@ private:
     QString m_gzipFileDestName;
 };
 
-class QTCREATOR_UTILS_EXPORT UnarchiverTaskAdapter : public Tasking::TaskAdapter<Unarchiver>
+class QTCREATOR_UTILS_EXPORT UnarchiverTaskAdapter final : public Tasking::TaskAdapter<Unarchiver>
 {
 public:
     UnarchiverTaskAdapter();
diff --git a/src/plugins/axivion/credentialquery.h b/src/plugins/axivion/credentialquery.h
index b5ea338c3bd..d8a958ab53e 100644
--- a/src/plugins/axivion/credentialquery.h
+++ b/src/plugins/axivion/credentialquery.h
@@ -30,7 +30,7 @@ private:
     friend class CredentialQueryTaskAdapter;
 };
 
-class CredentialQueryTaskAdapter : public Tasking::TaskAdapter<CredentialQuery>
+class CredentialQueryTaskAdapter final : public Tasking::TaskAdapter<CredentialQuery>
 {
 private:
     ~CredentialQueryTaskAdapter();
diff --git a/src/plugins/ios/iostoolhandler.h b/src/plugins/ios/iostoolhandler.h
index 33d413e3cfc..e8071a86ce0 100644
--- a/src/plugins/ios/iostoolhandler.h
+++ b/src/plugins/ios/iostoolhandler.h
@@ -87,7 +87,7 @@ private:
     Internal::IosDeviceType m_deviceType = Internal::IosDeviceType::IosDevice;
 };
 
-class IosToolTaskAdapter : public Tasking::TaskAdapter<IosToolRunner>
+class IosToolTaskAdapter final : public Tasking::TaskAdapter<IosToolRunner>
 {
 public:
     IosToolTaskAdapter();
diff --git a/src/plugins/languageclient/clientrequest.h b/src/plugins/languageclient/clientrequest.h
index d1ed3161741..8d1304e044f 100644
--- a/src/plugins/languageclient/clientrequest.h
+++ b/src/plugins/languageclient/clientrequest.h
@@ -67,7 +67,7 @@ public:
     bool preStartCheck() override;
 };
 
-class LANGUAGECLIENT_EXPORT ClientWorkspaceSymbolRequestTaskAdapter
+class LANGUAGECLIENT_EXPORT ClientWorkspaceSymbolRequestTaskAdapter final
     : public Tasking::TaskAdapter<ClientWorkspaceSymbolRequest>
 {
 public:
diff --git a/src/plugins/languageclient/currentdocumentsymbolsrequest.h b/src/plugins/languageclient/currentdocumentsymbolsrequest.h
index 3ea7ee5f152..a45d92f8a29 100644
--- a/src/plugins/languageclient/currentdocumentsymbolsrequest.h
+++ b/src/plugins/languageclient/currentdocumentsymbolsrequest.h
@@ -39,7 +39,7 @@ private:
     QList<QMetaObject::Connection> m_connections;
 };
 
-class LANGUAGECLIENT_EXPORT CurrentDocumentSymbolsRequestTaskAdapter
+class LANGUAGECLIENT_EXPORT CurrentDocumentSymbolsRequestTaskAdapter final
     : public Tasking::TaskAdapter<CurrentDocumentSymbolsRequest>
 {
 public:
diff --git a/src/plugins/projectexplorer/devicesupport/filetransfer.h b/src/plugins/projectexplorer/devicesupport/filetransfer.h
index 2d84351d55c..87fc7a940b7 100644
--- a/src/plugins/projectexplorer/devicesupport/filetransfer.h
+++ b/src/plugins/projectexplorer/devicesupport/filetransfer.h
@@ -54,7 +54,7 @@ public:
     void start() override { task()->start(); }
 };
 
-class PROJECTEXPLORER_EXPORT FileTransferTestTaskAdapter : public FileTransferTaskAdapter
+class PROJECTEXPLORER_EXPORT FileTransferTestTaskAdapter final : public FileTransferTaskAdapter
 {
 public:
     void start() final { task()->test(); }
diff --git a/src/plugins/projectexplorer/devicesupport/idevice.h b/src/plugins/projectexplorer/devicesupport/idevice.h
index 490906bf901..12b8fa418fc 100644
--- a/src/plugins/projectexplorer/devicesupport/idevice.h
+++ b/src/plugins/projectexplorer/devicesupport/idevice.h
@@ -290,7 +290,7 @@ private:
     QString m_errorString;
 };
 
-class PROJECTEXPLORER_EXPORT DeviceProcessKillerTaskAdapter
+class PROJECTEXPLORER_EXPORT DeviceProcessKillerTaskAdapter final
     : public Tasking::TaskAdapter<DeviceProcessKiller>
 {
 public:
diff --git a/src/plugins/qbsprojectmanager/qbsrequest.h b/src/plugins/qbsprojectmanager/qbsrequest.h
index bd3eb6db43c..340bbe0f12f 100644
--- a/src/plugins/qbsprojectmanager/qbsrequest.h
+++ b/src/plugins/qbsprojectmanager/qbsrequest.h
@@ -40,7 +40,7 @@ private:
     QbsRequestObject *m_requestObject = nullptr;
 };
 
-class QbsRequestTaskAdapter : public Tasking::TaskAdapter<QbsRequest>
+class QbsRequestTaskAdapter final : public Tasking::TaskAdapter<QbsRequest>
 {
 public:
     QbsRequestTaskAdapter() { connect(task(), &QbsRequest::done, this, &TaskInterface::done); }
diff --git a/src/plugins/valgrind/valgrindprocess.h b/src/plugins/valgrind/valgrindprocess.h
index 7a4e722c0da..04e0d4bbc46 100644
--- a/src/plugins/valgrind/valgrindprocess.h
+++ b/src/plugins/valgrind/valgrindprocess.h
@@ -61,7 +61,7 @@ private:
     std::unique_ptr<ValgrindProcessPrivate> d;
 };
 
-class ValgrindProcessTaskAdapter : public Tasking::TaskAdapter<ValgrindProcess>
+class ValgrindProcessTaskAdapter final : public Tasking::TaskAdapter<ValgrindProcess>
 {
 public:
     ValgrindProcessTaskAdapter() {
diff --git a/src/plugins/valgrind/xmlprotocol/parser.h b/src/plugins/valgrind/xmlprotocol/parser.h
index 9116ad6d81a..f53609ccf66 100644
--- a/src/plugins/valgrind/xmlprotocol/parser.h
+++ b/src/plugins/valgrind/xmlprotocol/parser.h
@@ -51,7 +51,7 @@ private:
     std::unique_ptr<ParserPrivate> d;
 };
 
-class ParserTaskAdapter : public Tasking::TaskAdapter<Parser>
+class ParserTaskAdapter final : public Tasking::TaskAdapter<Parser>
 {
 public:
     ParserTaskAdapter() { connect(task(), &Parser::done, this, &Tasking::TaskInterface::done); }