diff --git a/tests/libslic3r/test_astar.cpp b/tests/libslic3r/test_astar.cpp
index 867f5be470..4e540c3c1e 100644
--- a/tests/libslic3r/test_astar.cpp
+++ b/tests/libslic3r/test_astar.cpp
@@ -134,7 +134,7 @@ struct CellGridTracer2D_AllDirs {
     template<class Fn>
     void foreach_reachable(const Vec2i &src, Fn &&fn) const
     {
-        auto is_inside = [](const Vec2i& v) { return v.x() >= 0 && v.x() < Cols && v.y() >= 0 && v.y() < Rows; };
+        auto is_inside = [](const Vec2i& v) { return v.x() >= 0 && v.x() < int(Cols) && v.y() >= 0 && v.y() < int(Rows); };
         if (Vec2i crd = src + Vec2i{0, 1}; is_inside(crd) && grid[crd.y()] [crd.x()] == ON) fn(crd);
         if (Vec2i crd = src + Vec2i{1, 0}; is_inside(crd) && grid[crd.y()] [crd.x()] == ON) fn(crd);
         if (Vec2i crd = src + Vec2i{1, 1}; is_inside(crd) && grid[crd.y()] [crd.x()] == ON) fn(crd);
@@ -171,7 +171,7 @@ struct CellGridTracer2D_Axis {
     template<class Fn>
     void foreach_reachable(const Vec2i &src, Fn &&fn) const
     {
-        auto is_inside = [](const Vec2i& v) { return v.x() >= 0 && v.x() < Cols && v.y() >= 0 && v.y() < Rows; };
+        auto is_inside = [](const Vec2i& v) { return v.x() >= 0 && v.x() < int(Cols) && v.y() >= 0 && v.y() < int(Rows); };
         if (Vec2i crd = src + Vec2i{0, 1}; is_inside(crd) && grid[crd.y()] [crd.x()] == ON) fn(crd);
         if (Vec2i crd = src + Vec2i{0, -1}; is_inside(crd) && grid[crd.y()] [crd.x()] == ON) fn(crd);
         if (Vec2i crd = src + Vec2i{1, 0}; is_inside(crd) && grid[crd.y()] [crd.x()] == ON) fn(crd);
diff --git a/tests/libslic3r/test_kdtreeindirect.cpp b/tests/libslic3r/test_kdtreeindirect.cpp
index 28d409bbbf..bc6ace7954 100644
--- a/tests/libslic3r/test_kdtreeindirect.cpp
+++ b/tests/libslic3r/test_kdtreeindirect.cpp
@@ -31,11 +31,6 @@ static double volume(const BoundingBox3Base<Vec3f> &box)
     return sz.x() * sz.y() * sz.z();
 }
 
-static double volume(const Eigen::AlignedBox<float, 3> &box)
-{
-    return box.volume();
-}
-
 TEST_CASE("Test kdtree query for a Box", "[KDTreeIndirect]")
 {
     auto vol = BoundingBox3Base<Vec3f>{{0.f, 0.f, 0.f}, {10.f, 10.f, 10.f}};