diff --git a/src/plugins/cppeditor/cpphighlighter.cpp b/src/plugins/cppeditor/cpphighlighter.cpp
index 1f83b317ada..0f9184600b8 100644
--- a/src/plugins/cppeditor/cpphighlighter.cpp
+++ b/src/plugins/cppeditor/cpphighlighter.cpp
@@ -513,6 +513,7 @@ void CppHighlighterTest::test_data()
     QTest::newRow("struct keyword") << 25 << 1 << 25 << 6 << C_KEYWORD;
     QTest::newRow("operator keyword") << 26 << 5 << 26 << 12 << C_KEYWORD;
     QTest::newRow("type in conversion operator") << 26 << 14 << 26 << 16 << C_PRIMITIVE_TYPE;
+    QTest::newRow("concept keyword") << 29 << 22 << 29 << 28 << C_KEYWORD;
 }
 
 void CppHighlighterTest::test()
diff --git a/src/plugins/cppeditor/testcases/highlightingtestcase.cpp b/src/plugins/cppeditor/testcases/highlightingtestcase.cpp
index 20fa2526467..770b22e553e 100644
--- a/src/plugins/cppeditor/testcases/highlightingtestcase.cpp
+++ b/src/plugins/cppeditor/testcases/highlightingtestcase.cpp
@@ -25,3 +25,5 @@ template<int n = 5> class C;
 struct ConversionFunction {
     operator int();
 };
+
+template<typename T> concept NoConstraint = true;