diff --git a/unitest.py b/unitest.py
index 4a0a70b8..e2a496c4 100755
--- a/unitest.py
+++ b/unitest.py
@@ -21,7 +21,6 @@
 """Glances unitary tests suite."""
 
 import time
-from tracemalloc import Snapshot
 import unittest
 
 from glances.main import GlancesMain
@@ -39,6 +38,9 @@ from glances.compat import subsample, range
 from glances.secure import secure_popen
 from glances.compat import PY3
 
+if PY3:
+    from tracemalloc import Snapshot
+
 # Global variables
 # =================