diff --git a/scripts/tests/e3/items.lua b/scripts/tests/e3/items.lua
index 9c6035bf7..b2100f5ed 100644
--- a/scripts/tests/e3/items.lua
+++ b/scripts/tests/e3/items.lua
@@ -26,7 +26,7 @@ function test_goblins()
     for k, v in ipairs(restricted) do
         u1:add_item(v, 1)
         u2:add_item(v, 1)
-        u2:add_item(v, 1)
+        u3:add_item(v, 1)
     end
 
     u1:add_order("ATTACKIERE " .. itoa36(u2.id))
diff --git a/src/battle.c b/src/battle.c
index 9e2958242..fa5725c50 100644
--- a/src/battle.c
+++ b/src/battle.c
@@ -580,7 +580,12 @@ static bool i_canuse(const unit * u, const item_type * itype)
     if (itype->canuse) {
         result = itype->canuse(u, itype);
     }
-    assert(result==rc_can_use(u_race(u), itype));
+    if (result!=rc_can_use(u_race(u), itype)) {
+        log_error("conversion error: %s should be %s to use %s",
+            u->_race->_name,
+            result ? "allowed" : "forbidden",
+            itype->rtype->_name);
+    }
     return result;
 }