diff --git a/linalg/main.c b/linalg/main.c
index 7c713cf..461af8e 100644
--- a/linalg/main.c
+++ b/linalg/main.c
@@ -439,11 +439,11 @@ int main(void) {
     {
         Mat3 m = {{1, 0, 0, 0, 1, 0, 0, 0, 1}};
         float d = mat3_det(&m);
-        printf("Determinant: %f\n", d);
+        assert(fabsf(d - 1.0) <= 0.01);
 
         MAT3_AT(&m, 0, 0) = 2;
         d = mat3_det(&m);
-        printf("Determinant: %f\n", d);
+        assert(fabsf(d - 2.0) <= 0.01);
     }
     {
         /* Vector tests for addition, subtraction and multiplication (scale) */
@@ -477,17 +477,25 @@ int main(void) {
         assert(vec2_approx_eq(&m2, &v2_expected_add, 0.01));
     }
     {
-        Vec3 a = {10, 10, 10};
+        Vec3 a = {1, 0, 1};
         Vec3 b = {5, 5, 5};
         Vec3 c = vec3_cross(&a, &b);
-        printf("{ Vec3: %f, %f, %f }\n", c.x, c.y, c.z);
+
+        Vec3 expected = {-5, 0, 5};
+
+        assert(vec3_approx_eq(&expected, &c, 0.01));
     }
     {
         Vec3 a = {0, 1, 0};
         Vec3 b = {0, 0, 1};
         Vec3 c = vec3_cross(&a, &b);
-        printf("{ Vec3: %f, %f, %f }\n", c.x, c.y, c.z);
+
+        Vec3 expected = {1, 0, 0};
+
+        assert(vec3_approx_eq(&expected, &c, 0.01));
     }
 
+    printf("All tests passed!\n");
+
     return 0;
 }