diff --git a/include/list.h b/include/list.h
index fd1c366..42ff1cd 100644
--- a/include/list.h
+++ b/include/list.h
@@ -17,9 +17,11 @@ bool list_remove_by_idx(List *list, int index);
 void* list_get(List *list, int index);
 int list_get_size(List *list);
 bool list_remove_by_value(List *list, void *value);
+bool list_exists(List *list, void *value);
 
 bool int_list_append(List *list, intptr_t value);
 intptr_t int_list_get(List *list, int index);
 bool int_list_remove_by_value(List *list, intptr_t value);
+bool int_list_exists(List *list, intptr_t value);
 
 #endif
diff --git a/source/game.c b/source/game.c
index 49a6604..e41b1d6 100644
--- a/source/game.c
+++ b/source/game.c
@@ -2307,10 +2307,23 @@ static void game_shop_create_items()
 
     for (int i = 0; i < MAX_SHOP_JOKERS; i++)
     {
-        // TODO: weight the random choice by joker rarity
-        int joker_idx = random() % list_get_size(jokers_available_to_shop);
-        intptr_t joker_id = int_list_get(jokers_available_to_shop, joker_idx);
-        list_remove_by_idx(jokers_available_to_shop, joker_idx);
+        int joker_idx = 0;
+        intptr_t joker_id = 0;
+        #ifdef TEST_JOKER_ID // Allow defining an ID for a joker to always appear in shop and be tested
+        if (int_list_exists(jokers_available_to_shop, TEST_JOKER_ID))
+        {
+            joker_id = TEST_JOKER_ID;
+            int_list_remove_by_value(jokers_available_to_shop, joker_id);
+        }
+        else
+        #endif
+        {
+           joker_idx = random() % list_get_size(jokers_available_to_shop);
+           joker_id = int_list_get(jokers_available_to_shop, joker_idx);
+           // TODO: weight the random choice by joker rarity
+            list_remove_by_idx(jokers_available_to_shop, joker_idx);
+        }
+        
         
         JokerObject *joker_object = joker_object_new(joker_new(joker_id));
 
diff --git a/source/list.c b/source/list.c
index c57324a..cf66125 100644
--- a/source/list.c
+++ b/source/list.c
@@ -99,3 +99,23 @@ int list_get_size(List *list)
     }
     return list->size;
 }
+
+bool list_exists(List *list, void *value)
+{
+    if (list == NULL) return false;
+    
+    for (int i = 0; i < list->size; i++)
+    {
+        if (list->_array[i] == value)
+        {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool int_list_exists(List *list, intptr_t value)
+{
+    return list_exists(list, (void*)value);
+}
\ No newline at end of file