diff --git a/test_list.c b/test_list.c
index 565eca2..f0b9e53 100644
--- a/test_list.c
+++ b/test_list.c
@@ -69,7 +69,7 @@ TEST(test_list_obtain__shall_allocate_a_list) {
     mem_reset_stat();
     IntList list = list_obtain();
     ASSERT_TRUE(list != 0, MSG("Expected non-null list"));
-    ASSERT_TRUE(mem_get_alloc_call_cnt() == exp_alloc_cnt, MSG("Expected mem_alloc being called exactly %d time(s)", exp_alloc_cnt));
+    ASSERT_TRUE(mem_get_alloc_call_cnt() == exp_alloc_cnt, MSG("Expected mem_alloc being called exactly %d time(s), but was called %d time(s)", exp_alloc_cnt, mem_get_alloc_call_cnt()));
     ASSERT_TRUE(mem_is_allocated(list), MSG("Expected obtained list is allocated using mem_alloc"));
     if (list != 0) {
         free(list);
@@ -102,7 +102,7 @@ TEST(test_list_obtain_failed__shall_not_allocate_a_list) {
     mem_block_allocs(true);
     IntList list = list_obtain();
     ASSERT_TRUE(list == 0, MSG("Expected null list"));
-    ASSERT_TRUE(mem_get_alloc_call_cnt() == exp_alloc_cnt, MSG("Expected mem_alloc being called exactly %d time(s)", exp_alloc_cnt));
+    ASSERT_TRUE(mem_get_alloc_call_cnt() == exp_alloc_cnt, MSG("Expected mem_alloc being called exactly %d time(s), but was called %d time(s)", exp_alloc_cnt, mem_get_alloc_call_cnt()));
     if (list != 0) {
         free(list);
     }
@@ -548,11 +548,11 @@ TEST(test_list_get_size__shall_be_0_for_newly_obtained_list) {
 TEST(test_list_get_size__shall_reflect_number_of_values_after_adding_values) {
     IntList list = ASSERT_RESET_AND_NEW_VALID_LIST();
     list_insert(list, 71);
-    ASSERT_TRUE(list_get_size(list) == 1, MSG("Expected that size of list is 1 after adding first value"));
+    ASSERT_TRUE(list_get_size(list) == 1, MSG("Expected that size of list is 1 after adding first value, but found size %d", list_get_size(list)));
     list_insert(list, 72);
-    ASSERT_TRUE(list_get_size(list) == 2, MSG("Expected that size of list is 2 after adding second value"));
+    ASSERT_TRUE(list_get_size(list) == 2, MSG("Expected that size of list is 2 after adding second value, but found size %d", list_get_size(list)));
     list_insert(list, 73);
-    ASSERT_TRUE(list_get_size(list) == 3, MSG("Expected that size of list is 3 after adding third value"));
+    ASSERT_TRUE(list_get_size(list) == 3, MSG("Expected that size of list is 3 after adding third value, but found size %d", list_get_size(list)));
     ASSERT_MEM_STATUS(4, 0);
     ASSERT_FREE_VALID_LIST(&list);
 }
@@ -563,11 +563,11 @@ TEST(test_list_get_size__shall_reflect_number_of_values_after_removing_values) {
     list_insert(list, 82);
     list_insert(list, 83);
     list_remove_at(list, 0);
-    ASSERT_TRUE(list_get_size(list) == 2, MSG("Expected that size of list is 2 after removing first value"));
+    ASSERT_TRUE(list_get_size(list) == 2, MSG("Expected that size of list is 2 after removing first value, but found size %d", list_get_size(list)));
     list_remove_at(list, 1);
-    ASSERT_TRUE(list_get_size(list) == 1, MSG("Expected that size of list is 1 after removing second value"));
+    ASSERT_TRUE(list_get_size(list) == 1, MSG("Expected that size of list is 1 after removing second value, but found size %d", list_get_size(list)));
     list_remove_at(list, 0);
-    ASSERT_TRUE(list_get_size(list) == 0, MSG("Expected that size of list is 0 after removing third value"));
+    ASSERT_TRUE(list_get_size(list) == 0, MSG("Expected that size of list is 0 after removing third value, but found size %d", list_get_size(list)));
     ASSERT_MEM_STATUS(4, 3);
     ASSERT_FREE_VALID_LIST(&list);
 }
@@ -578,7 +578,7 @@ TEST(test_list_get_size__shall_be_0_after_clear) {
     list_insert(list, 82);
     list_insert(list, 83);
     list_clear(list);
-    ASSERT_TRUE(list_get_size(list) == 0, MSG("Expected that size of list is 0 after clearing the list"));
+    ASSERT_TRUE(list_get_size(list) == 0, MSG("Expected that size of list is 0 after clearing the list, but found size %d", list_get_size(list)));
     ASSERT_MEM_STATUS(4, 3);
     ASSERT_FREE_VALID_LIST(&list);
 }
@@ -775,9 +775,9 @@ TEST(test_list_it_obtain__shall_allocate_and_release_a_list_iterator_for_a_list)
     mem_reset_calls();
     IntListIterator it = list_it_obtain(list);
     ASSERT_TRUE(it != 0, MSG("Expected non-null list iterator"));
-    ASSERT_TRUE(mem_get_alloc_call_cnt() == 1, MSG("Expected mem_alloc being called exactly %d time(s) for the iterator", 1));
+    ASSERT_TRUE(mem_get_alloc_call_cnt() == 1, MSG("Expected mem_alloc being called exactly %d time(s) for the iterator, but was called %d time(s)", 1, mem_get_alloc_call_cnt()));
     list_it_release(&it);
-    ASSERT_TRUE(mem_get_free_call_cnt() == 1, MSG("Expected mem_free being called exactly %d time(s) for the iterator", 1));
+    ASSERT_TRUE(mem_get_free_call_cnt() == 1, MSG("Expected mem_free being called exactly %d time(s) for the iterator, but was called %d time(s)", 1, mem_get_free_call_cnt()));
     list_release(&list);
 }
 
@@ -788,9 +788,9 @@ TEST(test_list_it_obtain__shall_allocate_and_point_to_list_head) {
     IntListIterator it = list_it_obtain(list);
     ASSERT_TRUE(it != 0, MSG("Expected non-null list iterator"));
     ASSERT_TRUE(list_it_get(it) == 21, MSG("Expected list iterator pointing to list head (requires 'list_it_get()'"));
-    ASSERT_TRUE(mem_get_alloc_call_cnt() == 1, MSG("Expected mem_alloc being called exactly %d time(s) for the iterator", 1));
+    ASSERT_TRUE(mem_get_alloc_call_cnt() == 1, MSG("Expected mem_alloc being called exactly %d time(s) for the iterator, but was called %d time(s)", 1, mem_get_alloc_call_cnt()));
     list_it_release(&it);
-    ASSERT_TRUE(mem_get_free_call_cnt() == 1, MSG("Expected mem_free being called exactly %d time(s) for the iterator", 1));
+    ASSERT_TRUE(mem_get_free_call_cnt() == 1, MSG("Expected mem_free being called exactly %d time(s) for the iterator, but was called %d time(s)", 1, mem_get_free_call_cnt()));
     list_release(&list);
 }
 
@@ -798,7 +798,7 @@ TEST(test_list_it_obtain__shall_not_allocate_a_list_iterator_for_an_invalid_list
     mem_reset_calls();
     IntListIterator it = list_it_obtain(0);
     ASSERT_TRUE(it == 0, MSG("Expected null list iterator"));
-    ASSERT_TRUE(mem_get_alloc_call_cnt() == 0, MSG("Expected mem_alloc being called exactly %d time(s) for the iterator", 0));
+    ASSERT_TRUE(mem_get_alloc_call_cnt() == 0, MSG("Expected mem_alloc being called exactly %d time(s) for the iterator, but was called %d time(s)", 0, mem_get_alloc_call_cnt()));
 }
 
 TEST(test_list_it_is_valid) {