diff --git a/tests/libfixmath_unittests/tests/01-run.py b/tests/libfixmath_unittests/tests/01-run.py
index fffcbd2285..d5c4c49b21 100755
--- a/tests/libfixmath_unittests/tests/01-run.py
+++ b/tests/libfixmath_unittests/tests/01-run.py
@@ -9,9 +9,13 @@
 import os
 import sys
 
+# Float and print operations are slow on boards
+# Got 80 iotlab-m3 and 250 on samr21-xpro
+TIMEOUT = 300
+
 
 def testfunc(child):
-    child.expect('SUCCESS')
+    child.expect('SUCCESS', timeout=TIMEOUT)
 
 
 if __name__ == "__main__":