diff --git a/.travis.yml b/.travis.yml
index 54dee780e1..9dd90caf2d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,7 +50,7 @@ script:
   - /usr/local/bin/IfcConvert -yv acad2010_walls.ifc acad2010_walls.glb
   - gltf_validator acad2010_walls.glb
   
-  - python -c "from __future__ import print_function; import ifcopenshell; f = ifcopenshell.open('encoding.ifc'); print(f[1][0])" | grep "'a' 1m³ ≤ 5m³ ≥ 10m³"
+  - python -c "from __future__ import print_function; from io import open; import ifcopenshell; f = ifcopenshell.open('encoding.ifc'); print(f[1][0], file=open('encoding.txt', 'w', encoding='utf-8'))" && grep encoding.txt "'a' 1m³ ≤ 5m³ ≥ 10m³"
   
   - |
     (for i in *.ifc; do \