diff --git a/unittest.cbp b/unittest.cbp
index 6291924..1310ca3 100644
--- a/unittest.cbp
+++ b/unittest.cbp
@@ -32,6 +32,7 @@
 			<Add option="-Wall" />
 		</Compiler>
 		<Unit filename=".gitignore" />
+		<Unit filename="project/emptiness_width.h" />
 		<Unit filename="project/histogram.cpp" />
 		<Unit filename="project/histogram_internal.h" />
 		<Unit filename="unittest.cpp" />
diff --git a/unittest.cpp b/unittest.cpp
index 3cdd704..9646fb8 100644
--- a/unittest.cpp
+++ b/unittest.cpp
@@ -6,7 +6,7 @@
 #include "project/svg.h"
 #include "project/emptiness_width.h"
 
-/* TEST_CASE("distinct positive numbers 1")
+ TEST_CASE("distinct positive numbers")
 {
     double min = 0;
     double max = 0;
@@ -15,18 +15,6 @@
     CHECK(max == 2);
 }
 
-TEST_CASE("distinct positive numbers 2") {
-    double min = 0;
-    double max = 0;
-    std::vector<double>v{2,1};
-    CHECK(v.size() != 0);
-    CHECK(v.size() != 1);
-    find_minmax({1, 2}, min, max);
-    CHECK(min == 1);
-    CHECK(max == 2);
-    CHECK(min != max);
-}
-
 TEST_CASE("vector with one element") {
     double min = 0;
     double max = 0;
@@ -43,7 +31,14 @@ TEST_CASE("vector with same elements") {
     CHECK(max == 2);
 }
 
-*/
+TEST_CASE("void vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({0}, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}
+
 
 TEST_CASE("test1 var 5")
 {
@@ -61,6 +56,13 @@ TEST_CASE("test2 var 5")
     CHECK(c != b-a);
 }
 
+TEST_CASE("test3 var 5")
+{
+    size_t a = 100;
+    size_t b = a;
+    size_t c = emptiness_width (a,b);
+    CHECK(c == 0);
+}