diff --git a/src/items/xerewards.test.c b/src/items/xerewards.test.c
index 5ce7716f3..52a4d0ed0 100644
--- a/src/items/xerewards.test.c
+++ b/src/items/xerewards.test.c
@@ -19,13 +19,43 @@ static void test_manacrystal(CuTest *tc) {
 static void test_skillpotion(CuTest *tc) {
     unit *u;
     const struct item_type *itype;
+    skill* pSkill = NULL;
+    int initialWeeks_Entertainment = 0;
+    int initialWeeks_Stamina = 0;
+    int initialWeeks_Magic = 0;
 
     test_cleanup();
     test_create_world();
     u = test_create_unit(test_create_faction(NULL), findregion(0, 0));
     itype = test_create_itemtype("skillpotion");
     change_resource(u, itype->rtype, 2);
+
+    learn_skill(u, SK_ENTERTAINMENT, 1.0);
+    pSkill = unit_skill(u, SK_ENTERTAINMENT);
+    sk_set(pSkill, 5);
+    initialWeeks_Entertainment = pSkill->weeks;
+
+    learn_skill(u, SK_STAMINA, 1.0);
+    pSkill = unit_skill(u, SK_STAMINA);
+    sk_set(pSkill, 5);
+    initialWeeks_Stamina = pSkill->weeks;
+
+    learn_skill(u, SK_MAGIC, 1.0);
+    pSkill = unit_skill(u, SK_MAGIC);
+    sk_set(pSkill, 5);
+    initialWeeks_Magic = pSkill->weeks;
+
     CuAssertIntEquals(tc, 1, use_skillpotion(u, itype, 1, NULL));
+
+    pSkill = unit_skill(u, SK_ENTERTAINMENT);
+    CuAssertIntEquals(tc, initialWeeks_Entertainment - 3, pSkill->weeks);
+
+    pSkill = unit_skill(u, SK_STAMINA);
+    CuAssertIntEquals(tc, initialWeeks_Stamina - 3, pSkill->weeks);
+
+    pSkill = unit_skill(u, SK_MAGIC);
+    CuAssertIntEquals(tc, initialWeeks_Magic - 3, pSkill->weeks);
+
     test_cleanup();
 }