diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 34d29ea10a9063f317bc69dec078dc66a52f2a64..0ec9352190605e47a56095796e6a87233b6a9ba5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,10 +11,17 @@ stages:
     - cd minijson
     - python setup.py install
     - cd ..
+    - rm -rf minijson
     - pip install -r requirements.txt
+    - python setup.py build_ext --inplace
+  variables:
+    CI: "1"
   script:
-    - python setup.py test
+    - python -m coverage run -m nose2 -vv -F
+    - python -m coverage report
+
+
 
 test_python38:
   extends: .test_python
-  image: python:3.8
\ No newline at end of file
+  image: python:3.8
diff --git a/tempsdb/chunks/base.pyx b/tempsdb/chunks/base.pyx
index 0fa4df86a80ed4c0c16083814c1fafc369bf1d0d..5a90cb6b45afcba59ec8ac929ce4611afd819570 100644
--- a/tempsdb/chunks/base.pyx
+++ b/tempsdb/chunks/base.pyx
@@ -58,11 +58,10 @@ cdef class AlternativeMMap:
                 self.io.seek(item, 0)
                 b = self.io.read(1)
                 return b[0]
-            else:
-                start = item.start
-                stop = item.stop
-                self.io.seek(start, 0)
-                return self.io.read(stop-start)
+            start = item.start
+            stop = item.stop
+            self.io.seek(start, 0)
+            return self.io.read(stop-start)
 
     def __setitem__(self, key: tp.Union[int, slice], value: tp.Union[int, bytes]) -> None:
         cdef:
@@ -228,7 +227,7 @@ cdef class Chunk:
         if index > self.entries:
             raise ValueError('index too large')
         cdef unsigned long ofs = HEADER_SIZE + TIMESTAMP_SIZE + index * (self.block_size + TIMESTAMP_SIZE) + byte_index
-        return ord(self.mmap[ofs])
+        return self.mmap[ofs]
 
     cpdef bytes get_slice_of_piece_starting_at(self, unsigned int index, unsigned int start):
         """