diff --git a/test/TangoDataWriterH5Cpp_test.py b/test/TangoDataWriterH5Cpp_test.py
index 41ad170a..b41c0f40 100644
--- a/test/TangoDataWriterH5Cpp_test.py
+++ b/test/TangoDataWriterH5Cpp_test.py
@@ -54,7 +54,7 @@ def __init__(self, methodName):
     <group type="NXinstrument" name="instrument">
       <attribute name ="short_name"> scan instrument </attribute>
       <group type="NXdetector" name="detector">
-        <field units="m" type="NX_FLOAT" name="counter1">
+        <field units="µm" type="NX_FLOAT" name="counter1">
           <strategy mode="STEP"/>
           <datasource type="CLIENT">
             <record name="exp_c01"/>
@@ -1749,7 +1749,7 @@ def test_scanRecord_nexuspath(self):
 
             if os.path.isfile(fname):
                 os.remove(fname)
-#            pass
+            # pass
 
     # scanRecord test
     # \brief It tests recording of simple h5 file
diff --git a/test/TangoDataWriterH5PY_test.py b/test/TangoDataWriterH5PY_test.py
index 8fe5afdc..450d746f 100644
--- a/test/TangoDataWriterH5PY_test.py
+++ b/test/TangoDataWriterH5PY_test.py
@@ -54,7 +54,7 @@ def __init__(self, methodName):
     <group type="NXinstrument" name="instrument">
       <attribute name ="short_name"> scan instrument </attribute>
       <group type="NXdetector" name="detector">
-        <field units="m" type="NX_FLOAT" name="counter1">
+        <field units="µm" type="NX_FLOAT" name="counter1">
           <strategy mode="STEP"/>
           <datasource type="CLIENT">
             <record name="exp_c01"/>
@@ -1681,7 +1681,7 @@ def test_scanRecord_nexuspath(self):
             self.assertEqual(at.shape, ())
             self.assertEqual(at.dtype, "string")
             self.assertEqual(at.name, "units")
-            self.assertEqual(at[...], "m")
+            self.assertEqual(at[...], "µm")
 
             at = cnt.attributes["nexdatas_source"]
             self.assertTrue(at.is_valid)
@@ -1747,7 +1747,7 @@ def test_scanRecord_nexuspath(self):
 
             if os.path.isfile(fname):
                 os.remove(fname)
-#            pass
+            # pass
 
     # scanRecord test
     # \brief It tests recording of simple h5 file