diff --git a/test/cases/fs_mmap_offset.c b/test/cases/fs_mmap_offset.c
index 294293f3..155417a4 100644
--- a/test/cases/fs_mmap_offset.c
+++ b/test/cases/fs_mmap_offset.c
@@ -30,7 +30,7 @@ TEST_FIXTURE_TEARDOWN(fs)
     ev_fs_remove(NULL, NULL, s_file_path, 0, NULL);
 }
 
-TEST_F(fs, mmap_offset_half)
+TEST_F(fs, mmap_offset_half_size_0)
 {
     ev_file_t* file = ev_malloc(sizeof(ev_file_t));
     ASSERT_EQ_INT(ev_file_open(NULL, file, NULL, s_file_path, EV_FS_O_RDONLY, 0, NULL), 0);
@@ -47,3 +47,21 @@ TEST_F(fs, mmap_offset_half)
     ev_file_munmap(view);
     ev_free(view);
 }
+
+TEST_F(fs, mmap_offset_half_size_half)
+{
+    ev_file_t* file = ev_malloc(sizeof(ev_file_t));
+    ASSERT_EQ_INT(ev_file_open(NULL, file, NULL, s_file_path, EV_FS_O_RDONLY, 0, NULL), 0);
+
+    ev_file_map_t* view = ev_malloc(sizeof(ev_file_map_t));
+    ASSERT_EQ_INT(ev_file_mmap(view, file, s_mmap_offset_granularity, s_mmap_offset_granularity, EV_FS_S_IRUSR), 0);
+
+    const char* data = view->addr;
+    ASSERT_EQ_INT(memcmp(data, s_file_data + s_mmap_offset_granularity, s_mmap_offset_granularity), 0);
+
+    ev_file_close(file, NULL);
+    ev_free(file);
+
+    ev_file_munmap(view);
+    ev_free(view);
+}