diff --git a/poincare/include/poincare/unit.h b/poincare/include/poincare/unit.h
index 42a2b8e89..d85c7c3c5 100644
--- a/poincare/include/poincare/unit.h
+++ b/poincare/include/poincare/unit.h
@@ -231,7 +231,7 @@ public:
         Representative("min", "60*_s",
             Representative::Prefixable::No,
             NoPrefix, NoPrefixCount),
-        Representative("hour",   "60*60*_s",
+        Representative("h",   "60*60*_s",
             Representative::Prefixable::No,
             NoPrefix, NoPrefixCount),
         Representative("day", "24*60*60*_s",
diff --git a/poincare/test/simplification.cpp b/poincare/test/simplification.cpp
index b8f081626..8808bda1e 100644
--- a/poincare/test/simplification.cpp
+++ b/poincare/test/simplification.cpp
@@ -1008,12 +1008,12 @@ QUIZ_CASE(poincare_simplification_store_matrix) {
 }
 
 QUIZ_CASE(poincare_simplification_unit_convert) {
-  assert_parsed_expression_simplify_to("10_m/_s→_km/_hour", "36×_km×_hour^\x12-1\x13");
+  assert_parsed_expression_simplify_to("10_m/_s→_km/_h", "36×_km×_h^\x12-1\x13");
   assert_parsed_expression_simplify_to("2_m→_km×_m/_m", "0.002×_km");
   assert_parsed_expression_simplify_to("10_m/_s→_km", Undefined::Name());
-  assert_parsed_expression_simplify_to("10_m/_s→_km/_hour", "36×_km×_hour^\x12-1\x13");
+  assert_parsed_expression_simplify_to("10_m/_s→_km/_h", "36×_km×_h^\x12-1\x13");
   assert_parsed_expression_simplify_to("10_m^2→_mm×_km", "10×_km×_mm");
-  assert_parsed_expression_simplify_to("2_hour+2_min→_s", "7320×_s");
+  assert_parsed_expression_simplify_to("2_h+2_min→_s", "7320×_s");
   assert_parsed_expression_simplify_to("2×_kg×_m^2×_s^(-2)→_J", "2×_J");
   assert_parsed_expression_simplify_to("300000×_m^3→_km^(2.3+0.7)", "0.0003×_km^3");
   assert_parsed_expression_simplify_to("3×_m→6_km", "0.003×_km");