diff --git a/test/static/math_test.cpp b/test/static/math_test.cpp
index 8fa12342..292a9da6 100644
--- a/test/static/math_test.cpp
+++ b/test/static/math_test.cpp
@@ -20,11 +20,11 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#include <optional>
 #include <mp-units/math.h>  // IWYU pragma: keep
 #include <mp-units/systems/international/international.h>
 #include <mp-units/systems/isq/space_and_time.h>
 #include <mp-units/systems/si/unit_symbols.h>
+#include <optional>
 
 namespace {
 
diff --git a/test/static/quantity_point_test.cpp b/test/static/quantity_point_test.cpp
index 1d71957f..5be92922 100644
--- a/test/static/quantity_point_test.cpp
+++ b/test/static/quantity_point_test.cpp
@@ -21,13 +21,13 @@
 // SOFTWARE.
 
 #include "test_tools.h"
-#include <limits>
-#include <type_traits>
-#include <utility>
 #include <mp-units/quantity_point.h>
 #include <mp-units/systems/isq/isq.h>
 #include <mp-units/systems/si/si.h>
 #include <mp-units/systems/usc/usc.h>
+#include <limits>
+#include <type_traits>
+#include <utility>
 
 namespace {
 
diff --git a/test/static/si_test.cpp b/test/static/si_test.cpp
index c3005c40..853d51c4 100644
--- a/test/static/si_test.cpp
+++ b/test/static/si_test.cpp
@@ -20,9 +20,9 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#include <type_traits>
 #include <mp-units/math.h>
 #include <mp-units/systems/si/si.h>
+#include <type_traits>
 
 namespace {
 
diff --git a/test/static/test_tools.h b/test/static/test_tools.h
index ff9348ba..42cbc61e 100644
--- a/test/static/test_tools.h
+++ b/test/static/test_tools.h
@@ -22,8 +22,8 @@
 
 #pragma once
 
-#include <type_traits>
 #include <mp-units/quantity_spec.h>
+#include <type_traits>
 
 template<auto V, typename T>
 inline constexpr bool is_of_type = std::is_same_v<std::remove_cvref_t<decltype(V)>, T>;