diff --git a/tests/test_calculations.cpp b/tests/test_calculations.cpp
index 292c127..af6bb3d 100644
--- a/tests/test_calculations.cpp
+++ b/tests/test_calculations.cpp
@@ -139,7 +139,7 @@ const lest::test specification[] =
         p.T = 2794.4822;
         EXPECT( rcompare( f(), 1.768018, 0.02) );
     },
-    CASE("dEdx for compunds"){
+    CASE("dEdx for compounds"){
         catima::Projectile p{1,1,1,1000};
         catima::Material water({
                 {1.00794,1,2},
@@ -327,6 +327,15 @@ const lest::test specification[] =
         EXPECT(res0.sigma_r == res.results[0].sigma_r);
         EXPECT(res0.tof == res.results[0].tof);
 
+    },
+    CASE("default material calculations"){
+        catima::Projectile p{12,6,6,350};
+        auto air = catima::get_material(catima::material::AIR);
+        air.thickness(0.500);
+        auto res = catima::calculate(p(350),air);
+        EXPECT(res.Eout == approx(345.6).epsilon(1e-2));
+        EXPECT(res.sigma_a == approx(0.0013).epsilon(1e-2));
+        EXPECT(res.sigma_E == approx(0.12).epsilon(1e-2));
     }
     
 };
diff --git a/tests/test_structures.cpp b/tests/test_structures.cpp
index 9b718d5..a9c83b2 100644
--- a/tests/test_structures.cpp
+++ b/tests/test_structures.cpp
@@ -181,6 +181,25 @@ const lest::test specification[] =
         mat5.add_element(12,6,1);
         EXPECT(mat5.ncomponents()==mat6.ncomponents()+1);
 
+    },
+    CASE("int and double stn check"){
+      catima::Projectile p{1,1,1,1000};
+      catima::Material mat1({
+                        {12.01, 6, 1},
+                        {16.00, 8, 1}
+                        });
+      catima::Material mat2({
+                        {12.01, 6, 0.5},
+                        {16.00, 8, 0.5}
+                        });
+      mat1.thickness(1.0);
+      mat2.thickness(1.0);
+      auto res1 = catima::calculate(p(1000),mat1);
+      auto res2 = catima::calculate(p(1000),mat2);
+      EXPECT(res1.dEdxi == res2.dEdxi);
+      EXPECT(res1.range == res2.range);
+      EXPECT(res1.sigma_a == res2.sigma_a);
+      EXPECT(res1.sigma_r == res2.sigma_r);
     }
 };