diff --git a/Makefile b/Makefile
index 41177cbc9bd4..314bf5c4e66e 100644
--- a/Makefile
+++ b/Makefile
@@ -805,7 +805,7 @@ test/testpostfixoperator.o: test/testpostfixoperator.cpp lib/addoninfo.h lib/che
 test/testpreprocessor.o: test/testpreprocessor.cpp externals/simplecpp/simplecpp.h lib/addoninfo.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/preprocessor.h lib/settings.h lib/standards.h lib/suppressions.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testpreprocessor.cpp
 
-test/testprocessexecutor.o: test/testprocessexecutor.cpp cli/executor.h cli/processexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/checkunusedfunctions.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h test/redirect.h
+test/testprocessexecutor.o: test/testprocessexecutor.cpp cli/executor.h cli/processexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h test/redirect.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testprocessexecutor.cpp
 
 test/testsettings.o: test/testsettings.cpp lib/addoninfo.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h
@@ -823,7 +823,7 @@ test/testsimplifytypedef.o: test/testsimplifytypedef.cpp lib/addoninfo.h lib/che
 test/testsimplifyusing.o: test/testsimplifyusing.cpp lib/addoninfo.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/templatesimplifier.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/vfvalue.h test/fixture.h test/helpers.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testsimplifyusing.cpp
 
-test/testsingleexecutor.o: test/testsingleexecutor.cpp cli/executor.h cli/singleexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/checkunusedfunctions.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h test/redirect.h
+test/testsingleexecutor.o: test/testsingleexecutor.cpp cli/executor.h cli/singleexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h test/redirect.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testsingleexecutor.cpp
 
 test/testsizeof.o: test/testsizeof.cpp lib/addoninfo.h lib/check.h lib/checksizeof.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h
@@ -838,13 +838,13 @@ test/teststring.o: test/teststring.cpp lib/addoninfo.h lib/check.h lib/checkstri
 test/testsummaries.o: test/testsummaries.cpp lib/addoninfo.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/summaries.h lib/suppressions.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testsummaries.cpp
 
-test/testsuppressions.o: test/testsuppressions.cpp cli/cppcheckexecutor.h cli/executor.h cli/processexecutor.h cli/singleexecutor.h cli/threadexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/checkunusedfunctions.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h
+test/testsuppressions.o: test/testsuppressions.cpp cli/cppcheckexecutor.h cli/executor.h cli/processexecutor.h cli/singleexecutor.h cli/threadexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testsuppressions.cpp
 
 test/testsymboldatabase.o: test/testsymboldatabase.cpp lib/addoninfo.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/sourcelocation.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/vfvalue.h test/fixture.h test/helpers.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testsymboldatabase.cpp
 
-test/testthreadexecutor.o: test/testthreadexecutor.cpp cli/executor.h cli/threadexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/checkunusedfunctions.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h test/redirect.h
+test/testthreadexecutor.o: test/testthreadexecutor.cpp cli/executor.h cli/threadexecutor.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/color.h lib/config.h lib/cppcheck.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/tokenize.h lib/tokenlist.h lib/utils.h test/fixture.h test/helpers.h test/redirect.h
 	$(CXX) ${INCLUDE_FOR_TEST} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ test/testthreadexecutor.cpp
 
 test/testtimer.o: test/testtimer.cpp lib/addoninfo.h lib/check.h lib/color.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/standards.h lib/suppressions.h lib/timer.h lib/utils.h test/fixture.h
diff --git a/cli/signalhandler.h b/cli/signalhandler.h
index b900de6991c8..334b60145912 100644
--- a/cli/signalhandler.h
+++ b/cli/signalhandler.h
@@ -23,6 +23,8 @@
 
 #if defined(USE_UNIX_SIGNAL_HANDLING)
 
+#include <cstdio>
+
 /**
  * @param f Output file
  */
diff --git a/gui/checkthread.h b/gui/checkthread.h
index 0cea2d73549a..2b415bef6c51 100644
--- a/gui/checkthread.h
+++ b/gui/checkthread.h
@@ -24,6 +24,8 @@
 #include "suppressions.h"
 
 #include <atomic>
+#include <string>
+#include <vector>
 
 #include <QList>
 #include <QObject>
diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
index b23a8aeebae1..b42a81a232c4 100644
--- a/gui/mainwindow.cpp
+++ b/gui/mainwindow.cpp
@@ -39,6 +39,7 @@
 #include "report.h"
 #include "resultsview.h"
 #include "scratchpad.h"
+#include "settings.h"
 #include "showtypes.h"
 #include "statsdialog.h"
 #include "settingsdialog.h"
diff --git a/gui/mainwindow.h b/gui/mainwindow.h
index b0f059218cfb..5214b690ddca 100644
--- a/gui/mainwindow.h
+++ b/gui/mainwindow.h
@@ -20,12 +20,12 @@
 #define MAINWINDOW_H
 
 #include "library.h"
-#include "settings.h"
 #include "platforms.h"
 
 #include <QFileDialog>
 #include <QMainWindow>
 #include <QObject>
+#include <QPair>
 #include <QString>
 #include <QStringList>
 
@@ -43,6 +43,7 @@ class ImportProject;
 class QCloseEvent;
 class QNetworkAccessManager;
 class QNetworkReply;
+class Settings;
 namespace Ui {
     class MainWindow;
 }
diff --git a/gui/projectfiledialog.cpp b/gui/projectfiledialog.cpp
index b7c69861cfd6..47ef75e317f9 100644
--- a/gui/projectfiledialog.cpp
+++ b/gui/projectfiledialog.cpp
@@ -32,6 +32,7 @@
 
 #include <list>
 #include <string>
+#include <utility>
 
 #include <QByteArray>
 #include <QCheckBox>
diff --git a/gui/resultstree.cpp b/gui/resultstree.cpp
index 747f06cd6dd8..56c90f3a8a1a 100644
--- a/gui/resultstree.cpp
+++ b/gui/resultstree.cpp
@@ -23,6 +23,7 @@
 #include "common.h"
 #include "config.h"
 #include "erroritem.h"
+#include "errorlogger.h"
 #include "errortypes.h"
 #include "path.h"
 #include "projectfile.h"
@@ -32,6 +33,8 @@
 #include "threadhandler.h"
 #include "xmlreportv2.h"
 
+#include <utility>
+
 #include <QAction>
 #include <QApplication>
 #include <QClipboard>
diff --git a/gui/test/projectfile/testprojectfile.cpp b/gui/test/projectfile/testprojectfile.cpp
index 505a6e8937c1..8dee64092067 100644
--- a/gui/test/projectfile/testprojectfile.cpp
+++ b/gui/test/projectfile/testprojectfile.cpp
@@ -26,6 +26,8 @@
 
 #include <string>
 
+#include <QFile>
+#include <QIODevice>
 #include <QList>
 #include <QStringList>
 #include <QTemporaryDir>
diff --git a/gui/threadresult.cpp b/gui/threadresult.cpp
index 8f5989b885a7..1dbec569eb61 100644
--- a/gui/threadresult.cpp
+++ b/gui/threadresult.cpp
@@ -27,7 +27,6 @@
 #include <numeric>
 
 #include <QFile>
-#include <QMutexLocker>
 
 void ThreadResult::reportOut(const std::string &outmsg, Color /*c*/)
 {
diff --git a/gui/xmlreportv2.cpp b/gui/xmlreportv2.cpp
index 3bb5190e1837..583e865d678c 100644
--- a/gui/xmlreportv2.cpp
+++ b/gui/xmlreportv2.cpp
@@ -21,8 +21,11 @@
 #include "cppcheck.h"
 #include "erroritem.h"
 #include "report.h"
+#include "settings.h"
 #include "xmlreport.h"
 
+#include <utility>
+
 #include <QDebug>
 #include <QDir>
 #include <QFile>
diff --git a/lib/checkbufferoverrun.cpp b/lib/checkbufferoverrun.cpp
index 0dbb06562ffc..2e6111b8d01b 100644
--- a/lib/checkbufferoverrun.cpp
+++ b/lib/checkbufferoverrun.cpp
@@ -40,6 +40,7 @@
 #include <iterator>
 #include <numeric> // std::accumulate
 #include <sstream>
+#include <utility>
 
 #include "xml.h"
 
diff --git a/lib/checkunusedfunctions.cpp b/lib/checkunusedfunctions.cpp
index 63ed6b78ac53..292652fb019f 100644
--- a/lib/checkunusedfunctions.cpp
+++ b/lib/checkunusedfunctions.cpp
@@ -43,10 +43,6 @@
 
 #include "xml.h"
 
-namespace CTU {
-    class FileInfo;
-}
-
 //---------------------------------------------------------------------------
 
 static const CWE CWE561(561U);   // Dead Code
diff --git a/lib/clangimport.cpp b/lib/clangimport.cpp
index b23e448b8932..aa46a1ff2591 100644
--- a/lib/clangimport.cpp
+++ b/lib/clangimport.cpp
@@ -21,6 +21,7 @@
 #include "errortypes.h"
 #include "mathlib.h"
 #include "settings.h"
+#include "standards.h"
 #include "symboldatabase.h"
 #include "token.h"
 #include "tokenize.h"
diff --git a/lib/cppcheck.h b/lib/cppcheck.h
index f8f2627d1af6..64c5e0b3164f 100644
--- a/lib/cppcheck.h
+++ b/lib/cppcheck.h
@@ -33,6 +33,7 @@
 #include <functional>
 #include <list>
 #include <map>
+#include <memory>
 #include <set>
 #include <string>
 #include <unordered_set>
diff --git a/lib/errorlogger.cpp b/lib/errorlogger.cpp
index a81dee2146ea..f2c5f74c19b3 100644
--- a/lib/errorlogger.cpp
+++ b/lib/errorlogger.cpp
@@ -21,6 +21,7 @@
 #include "color.h"
 #include "cppcheck.h"
 #include "path.h"
+#include "settings.h"
 #include "suppressions.h"
 #include "token.h"
 #include "tokenlist.h"
diff --git a/lib/settings.cpp b/lib/settings.cpp
index e0402de3f85c..738202483d17 100644
--- a/lib/settings.cpp
+++ b/lib/settings.cpp
@@ -21,8 +21,9 @@
 #include "summaries.h"
 #include "vfvalue.h"
 
-#include <fstream>
-#include <sstream>
+#include <cctype>
+#include <fstream> // IWYU pragma: keep
+#include <sstream> // IWYU pragma: keep
 
 #include "json.h"
 
diff --git a/lib/settings.h b/lib/settings.h
index 825a4b7f73e8..aad106fed507 100644
--- a/lib/settings.h
+++ b/lib/settings.h
@@ -33,12 +33,15 @@
 #include <atomic>
 #include <cstddef>
 #include <cstdint>
+#include <functional>
 #include <list>
+#include <map>
 #include <set>
 #include <string>
 #include <tuple>
 #include <vector>
 #include <unordered_set>
+#include <utility>
 
 enum class SHOWTIME_MODES;
 namespace ValueFlow {
diff --git a/test/fixture.h b/test/fixture.h
index e4eb34395adb..d2ec804f41d6 100644
--- a/test/fixture.h
+++ b/test/fixture.h
@@ -30,10 +30,12 @@
 #include "standards.h"
 
 #include <cstddef>
+#include <cstdint>
 #include <list>
 #include <sstream>
 #include <stdexcept>
 #include <string>
+#include <type_traits>
 #include <utility>
 
 class options;
diff --git a/test/signal/test-signalhandler.cpp b/test/signal/test-signalhandler.cpp
index 4be872564d19..023137c2a918 100644
--- a/test/signal/test-signalhandler.cpp
+++ b/test/signal/test-signalhandler.cpp
@@ -23,6 +23,7 @@
 
 #include <cassert>
 #include <cfenv>
+#include <cstdlib>
 #include <cstring>
 
 // static functions are omitted from trace
diff --git a/test/signal/test-stacktrace.cpp b/test/signal/test-stacktrace.cpp
index 8cace95fb9e4..dd9a68485c07 100644
--- a/test/signal/test-stacktrace.cpp
+++ b/test/signal/test-stacktrace.cpp
@@ -21,6 +21,8 @@
 #ifdef USE_UNIX_BACKTRACE_SUPPORT
 #include "stacktrace.h"
 
+#include <cstdio>
+
 // static functions are omitted from trace
 
 /*static*/ void my_func_2()
diff --git a/test/testcmdlineparser.cpp b/test/testcmdlineparser.cpp
index 1df0a2ca761f..a552b6525565 100644
--- a/test/testcmdlineparser.cpp
+++ b/test/testcmdlineparser.cpp
@@ -33,7 +33,6 @@
 #include "timer.h"
 #include "utils.h"
 
-#include <cstdint>
 #include <cstdio>
 #include <list>
 #include <memory>
diff --git a/test/testerrorlogger.cpp b/test/testerrorlogger.cpp
index b49b634448db..49fc814ffa01 100644
--- a/test/testerrorlogger.cpp
+++ b/test/testerrorlogger.cpp
@@ -24,6 +24,7 @@
 
 #include <list>
 #include <string>
+#include <utility>
 
 #include "xml.h"
 
diff --git a/test/testimportproject.cpp b/test/testimportproject.cpp
index 049e399a561b..d8d65af4f10e 100644
--- a/test/testimportproject.cpp
+++ b/test/testimportproject.cpp
@@ -26,6 +26,7 @@
 #include <map>
 #include <sstream> // IWYU pragma: keep
 #include <string>
+#include <utility>
 #include <vector>
 
 class TestImporter : public ImportProject {
diff --git a/test/testpath.cpp b/test/testpath.cpp
index 61b49ef5f502..7e563ee57dfa 100644
--- a/test/testpath.cpp
+++ b/test/testpath.cpp
@@ -19,7 +19,9 @@
 #include "path.h"
 #include "fixture.h"
 #include "helpers.h"
+#include "standards.h"
 
+#include <set>
 #include <string>
 #include <vector>
 
diff --git a/test/testpathmatch.cpp b/test/testpathmatch.cpp
index 4aa580b478e1..615cb2b1246a 100644
--- a/test/testpathmatch.cpp
+++ b/test/testpathmatch.cpp
@@ -20,6 +20,7 @@
 #include "fixture.h"
 
 #include <string>
+#include <utility>
 #include <vector>
 
 
diff --git a/test/testprocessexecutor.cpp b/test/testprocessexecutor.cpp
index 808f9ec49ff2..1331ee037ab7 100644
--- a/test/testprocessexecutor.cpp
+++ b/test/testprocessexecutor.cpp
@@ -16,16 +16,15 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "checkunusedfunctions.h"
 #include "processexecutor.h"
 #include "redirect.h"
 #include "settings.h"
 #include "filesettings.h"
 #include "fixture.h"
 #include "helpers.h"
+#include "suppressions.h"
 #include "timer.h"
 
-#include <algorithm>
 #include <cstdlib>
 #include <list>
 #include <memory>
diff --git a/test/testsettings.cpp b/test/testsettings.cpp
index 1a2d27a16678..803e49dcb541 100644
--- a/test/testsettings.cpp
+++ b/test/testsettings.cpp
@@ -21,6 +21,9 @@
 #include "settings.h"
 #include "fixture.h"
 #include "helpers.h"
+#include "suppressions.h"
+
+
 
 class TestSettings : public TestFixture {
 public:
diff --git a/test/testsimplifytypedef.cpp b/test/testsimplifytypedef.cpp
index 3fecfb6e3cde..37c76de4eaac 100644
--- a/test/testsimplifytypedef.cpp
+++ b/test/testsimplifytypedef.cpp
@@ -22,6 +22,7 @@
 #include "platform.h"
 #include "settings.h"
 #include "fixture.h"
+#include "standards.h"
 #include "token.h"
 #include "tokenize.h"
 #include "tokenlist.h"
diff --git a/test/testsingleexecutor.cpp b/test/testsingleexecutor.cpp
index 8062fed5ea1c..b858a98cfe9c 100644
--- a/test/testsingleexecutor.cpp
+++ b/test/testsingleexecutor.cpp
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "checkunusedfunctions.h"
 #include "cppcheck.h"
 #include "filesettings.h"
 #include "fixture.h"
@@ -24,9 +23,9 @@
 #include "redirect.h"
 #include "settings.h"
 #include "singleexecutor.h"
+#include "suppressions.h"
 #include "timer.h"
 
-#include <algorithm>
 #include <cstdlib>
 #include <list>
 #include <memory>
diff --git a/test/testsuppressions.cpp b/test/testsuppressions.cpp
index 0f80af45e4e4..927d6938d693 100644
--- a/test/testsuppressions.cpp
+++ b/test/testsuppressions.cpp
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "checkunusedfunctions.h"
 #include "config.h"
 #include "cppcheck.h"
 #include "cppcheckexecutor.h"
@@ -30,7 +29,6 @@
 #include "threadexecutor.h"
 #include "singleexecutor.h"
 
-#include <algorithm>
 #include <cstddef>
 #include <cstring>
 #include <list>
diff --git a/test/testsymboldatabase.cpp b/test/testsymboldatabase.cpp
index b3e0818d8e56..4bdf44796dff 100644
--- a/test/testsymboldatabase.cpp
+++ b/test/testsymboldatabase.cpp
@@ -19,7 +19,6 @@
 #include "errortypes.h"
 #include "fixture.h"
 #include "helpers.h"
-#include "library.h"
 #include "platform.h"
 #include "settings.h"
 #include "sourcelocation.h"
@@ -34,12 +33,10 @@
 #include <iterator>
 #include <limits>
 #include <list>
-#include <map>
 #include <set>
 #include <sstream>
 #include <stdexcept>
 #include <string>
-#include <unordered_map>
 #include <vector>
 
 class TestSymbolDatabase;
diff --git a/test/testthreadexecutor.cpp b/test/testthreadexecutor.cpp
index 9bed9009bfc7..0216fb1ef203 100644
--- a/test/testthreadexecutor.cpp
+++ b/test/testthreadexecutor.cpp
@@ -16,12 +16,12 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "checkunusedfunctions.h"
 #include "redirect.h"
 #include "settings.h"
 #include "filesettings.h"
 #include "fixture.h"
 #include "helpers.h"
+#include "suppressions.h"
 #include "threadexecutor.h"
 #include "timer.h"
 
diff --git a/test/testtoken.cpp b/test/testtoken.cpp
index a93a8dda529d..1a75ccc30842 100644
--- a/test/testtoken.cpp
+++ b/test/testtoken.cpp
@@ -20,6 +20,7 @@
 #include "errortypes.h"
 #include "fixture.h"
 #include "helpers.h"
+#include "standards.h"
 #include "token.h"
 #include "tokenize.h"
 #include "tokenlist.h"
diff --git a/test/testunusedvar.cpp b/test/testunusedvar.cpp
index 5bd59e6f5dc9..9f81ec5cf56f 100644
--- a/test/testunusedvar.cpp
+++ b/test/testunusedvar.cpp
@@ -22,6 +22,7 @@
 #include "preprocessor.h"
 #include "settings.h"
 #include "fixture.h"
+#include "standards.h"
 #include "tokenize.h"
 
 #include <list>
diff --git a/test/testvarid.cpp b/test/testvarid.cpp
index 1fc5a500dbea..9da4a4a53aba 100644
--- a/test/testvarid.cpp
+++ b/test/testvarid.cpp
@@ -27,6 +27,7 @@
 
 #include <sstream> // IWYU pragma: keep
 #include <string>
+#include <vector>
 
 class TestVarID : public TestFixture {
 public: