diff --git a/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.compile.pass.cpp b/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.compile.pass.cpp
index f2e86e214a353..9e04c16d05faf 100644
--- a/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.compile.pass.cpp
+++ b/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.compile.pass.cpp
@@ -13,6 +13,7 @@
 // concept predicate;
 
 #include <concepts>
+#include <type_traits>
 
 static_assert(std::predicate<bool()>);
 static_assert(std::predicate<bool (*)()>);
diff --git a/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.pass.cpp b/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.pass.cpp
index 5c5941599f0b0..e4c8f608cd9ff 100644
--- a/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.pass.cpp
+++ b/libcxx/test/std/concepts/concepts.callable/concept.predicate/predicate.pass.cpp
@@ -13,6 +13,7 @@
 // concept predicate;
 
 #include <concepts>
+#include <type_traits>
 
 static_assert(std::predicate<bool()>);
 static_assert(std::predicate<bool (*)()>);
diff --git a/libcxx/test/std/concepts/concepts.lang/concept.common/common_with.compile.pass.cpp b/libcxx/test/std/concepts/concepts.lang/concept.common/common_with.compile.pass.cpp
index d66d00d370805..45c8f4825dc56 100644
--- a/libcxx/test/std/concepts/concepts.lang/concept.common/common_with.compile.pass.cpp
+++ b/libcxx/test/std/concepts/concepts.lang/concept.common/common_with.compile.pass.cpp
@@ -13,6 +13,7 @@
 // concept common_with;
 
 #include <concepts>
+#include <type_traits>
 
 template <class T, class U>
 constexpr bool CheckCommonWith() noexcept {
diff --git a/libcxx/test/std/concepts/concepts.lang/concept.commonref/common_reference.compile.pass.cpp b/libcxx/test/std/concepts/concepts.lang/concept.commonref/common_reference.compile.pass.cpp
index 114058e5cf6f0..6bd8906b0c0cc 100644
--- a/libcxx/test/std/concepts/concepts.lang/concept.commonref/common_reference.compile.pass.cpp
+++ b/libcxx/test/std/concepts/concepts.lang/concept.commonref/common_reference.compile.pass.cpp
@@ -13,6 +13,7 @@
 // concept common_reference_with;
 
 #include <concepts>
+#include <type_traits>
 
 template <class T, class U>
 constexpr bool CheckCommonReferenceWith() noexcept {