diff --git a/conf/e3/config.json b/conf/e3/config.json
index 421a962a7..a6685a06f 100644
--- a/conf/e3/config.json
+++ b/conf/e3/config.json
@@ -57,7 +57,7 @@
         "rules.owners.force_leave": false,
         "rules.monsters.attack_chance": 0.1,
         "rules.transfermen": false,
-        "rules.stealth.faction": true,
+        "stealth.faction.other": false,
         "rules.stealth.anon_battle": false,
         "rules.check_overload": false,
         "rules.combat.goblinbonus": 3,
diff --git a/conf/e4/config.json b/conf/e4/config.json
index ffa11443c..90c60d72b 100644
--- a/conf/e4/config.json
+++ b/conf/e4/config.json
@@ -55,7 +55,7 @@
         "rules.reserve.twophase": true,
         "rules.owners.force_leave": false,
         "rules.transfermen": false,
-        "rules.stealth.faction": true,
+        "stealth.faction.other": false,
         "rules.stealth.anon_battle": false,
         "rules.check_overload": false,
         "rules.combat.goblinbonus": 3,
diff --git a/scripts/tests/e2/stealth.lua b/scripts/tests/e2/stealth.lua
index 7644b3c6c..ab4320bb1 100644
--- a/scripts/tests/e2/stealth.lua
+++ b/scripts/tests/e2/stealth.lua
@@ -19,36 +19,33 @@ end
 function setup()
     eressea.game.reset()
     set_rule('rules.food.flags', '4')
-    set_rule('rules.magic.playerschools', '')
 
     local r = region.create(0,0, "plain")
     f = faction.create("stealthy@eressea.de", "human", "de")
     u = unit.create(f, r, 1)
     f = faction.create("stealth@eressea.de", "human", "de")
+    unit.create(f, r, 1) -- TARNE PARTEI NUMMER <no> must have a unit in the region
 end
 
 function teardown()
     set_rule('rules.food.flags')
-    set_rule('rules.magic.playerschools')
-    set_rule('rules.stealth.faction')
 end
 
 function test_stealth_faction_on()
 	u:clear_orders()
 	u:add_order("TARNEN PARTEI")
 
-    set_rule("rules.stealth.faction", 1)
 	process_orders()
 	assert_not_match("Partei", report.report_unit(u, f))
 	assert_match("anonym", report.report_unit(u, f))
 end
 
-function test_stealth_faction_off()
+function test_stealth_faction_other()
+    u.name = "Enno"
 	u:clear_orders()
-	u:add_order("TARNEN PARTEI")
+	u:add_order("TARNEN PARTEI NUMMER " .. itoa36(f.id))
 
-    set_rule("rules.stealth.faction", 0)
 	process_orders()
-	assert_match("Partei", report.report_unit(u, f))
+	assert_match(itoa36(f.id), report.report_unit(u, f))
 	assert_not_match("anonym", report.report_unit(u, f))
 end
diff --git a/scripts/tests/e3/stealth.lua b/scripts/tests/e3/stealth.lua
index bc78db006..38ca7d8ea 100644
--- a/scripts/tests/e3/stealth.lua
+++ b/scripts/tests/e3/stealth.lua
@@ -6,31 +6,29 @@ local f
 local u
 
 function setup()
-	eressea.game.reset()
-	eressea.settings.set("rules.food.flags", "4")
+    eressea.game.reset()
+    eressea.settings.set("rules.food.flags", "4")
 
-	local r = region.create(0,0, "plain")
-	f = faction.create("stealth1@eressea.de", "human", "de")
-	u = unit.create(f, r, 1)
-	f = faction.create("stealth2@eressea.de", "human", "de")
+    local r = region.create(0,0, "plain")
+    f = faction.create("stealth1@eressea.de", "human", "de")
+    u = unit.create(f, r, 1)
+    f = faction.create("stealth2@eressea.de", "human", "de")
 end
 
 function test_stealth_faction_on()
-	u:clear_orders()
-	u:add_order("TARNE PARTEI")
+    u:clear_orders()
+    u:add_order("TARNE PARTEI")
 
-	eressea.settings.set("rules.stealth.faction", 1)
-	process_orders()
-	assert_not_match("Partei", report.report_unit(u, f))
-	assert_match("anonym", report.report_unit(u, f))
+    process_orders()
+    assert_not_match("Partei", report.report_unit(u, f))
+    assert_match("anonym", report.report_unit(u, f))
 end
 
-function test_stealth_faction_off()
-	u:clear_orders()
-	u:add_order("TARNE PARTEI")
+function test_stealth_faction_other()
+    u:clear_orders()
+    u:add_order("TARNE PARTEI " .. itoa36(f.id))
 
-	eressea.settings.set("rules.stealth.faction", 0)
-	process_orders()
-	assert_match("Partei", report.report_unit(u, f))
-	assert_not_match("anonym", report.report_unit(u, f))
+    process_orders()
+    assert_not_match("anonym", report.report_unit(u, f))
+    assert_not_match(itoa36(f.id), report.report_unit(u, f))
 end
diff --git a/src/attributes/CMakeLists.txt b/src/attributes/CMakeLists.txt
index b095f2abb..954f55443 100644
--- a/src/attributes/CMakeLists.txt
+++ b/src/attributes/CMakeLists.txt
@@ -1,6 +1,7 @@
 PROJECT(attributes C)
 SET(_TEST_FILES
 stealth.test.c
+otherfaction.test.c
 )
 
 SET(_FILES
diff --git a/src/attributes/otherfaction.c b/src/attributes/otherfaction.c
index 0c225b256..76d035dd1 100644
--- a/src/attributes/otherfaction.c
+++ b/src/attributes/otherfaction.c
@@ -40,13 +40,9 @@ void write_of(const struct attrib *a, const void *owner, struct storage *store)
 int read_of(struct attrib *a, void *owner, struct storage *store)
 {                               /* return 1 on success, 0 if attrib needs removal */
     int of;
-    static int rule = -1;
-    if (rule < 0) {
-        rule = rule_stealth_faction();
-    }
 
     READ_INT(store, &of);
-    if (rule & 2) {
+    if (rule_stealth_other()) {
         a->data.v = findfaction(of);
         if (a->data.v) {
             return AT_READ_OK;
diff --git a/src/attributes/otherfaction.h b/src/attributes/otherfaction.h
index 5400d6077..726d86b0e 100644
--- a/src/attributes/otherfaction.h
+++ b/src/attributes/otherfaction.h
@@ -20,6 +20,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 extern "C" {
 #endif
 
+    struct unit;
     struct faction;
     struct attrib;
     extern struct attrib_type at_otherfaction;
diff --git a/src/attributes/otherfaction.test.c b/src/attributes/otherfaction.test.c
new file mode 100644
index 000000000..0b38901eb
--- /dev/null
+++ b/src/attributes/otherfaction.test.c
@@ -0,0 +1,57 @@
+#include <platform.h>
+
+#include "otherfaction.h"
+
+#include <kernel/config.h>
+#include <kernel/unit.h>
+#include <kernel/region.h>
+#include <kernel/faction.h>
+
+#include <util/attrib.h>
+
+#include <CuTest.h>
+#include <tests.h>
+
+#include <stdlib.h>
+#include <assert.h>
+
+static void test_rules(CuTest *tc) {
+    test_cleanup();
+    set_param(&global.parameters, "stealth.faction.other", NULL);
+    CuAssertIntEquals(tc, true, rule_stealth_other());
+    set_param(&global.parameters, "stealth.faction.other", "0");
+    CuAssertIntEquals(tc, false, rule_stealth_other());
+    set_param(&global.parameters, "stealth.faction.other", "1");
+    CuAssertIntEquals(tc, true, rule_stealth_other());
+
+    set_param(&global.parameters, "stealth.faction.anon", NULL);
+    CuAssertIntEquals(tc, true, rule_stealth_anon());
+    set_param(&global.parameters, "stealth.faction.anon", "0");
+    CuAssertIntEquals(tc, false, rule_stealth_anon());
+    set_param(&global.parameters, "stealth.faction.anon", "1");
+    CuAssertIntEquals(tc, true, rule_stealth_anon());
+    test_cleanup();
+}
+
+static void test_otherfaction(CuTest *tc) {
+    unit *u;
+    faction *f;
+
+    test_cleanup();
+    u = test_create_unit(test_create_faction(0), test_create_region(0, 0, 0));
+    f = test_create_faction(0);
+    set_param(&global.parameters, "stealth.faction.other", "1");
+    CuAssertIntEquals(tc, true, rule_stealth_other());
+    CuAssertPtrEquals(tc, u->faction, visible_faction(f, u));
+    a_add(&u->attribs, make_otherfaction(f));
+    CuAssertPtrEquals(tc, f, visible_faction(f, u));
+    test_cleanup();
+}
+
+CuSuite *get_otherfaction_suite(void)
+{
+    CuSuite *suite = CuSuiteNew();
+    SUITE_ADD_TEST(suite, test_rules);
+    SUITE_ADD_TEST(suite, test_otherfaction);
+    return suite;
+}
diff --git a/src/attributes/stealth.test.c b/src/attributes/stealth.test.c
index 90ee66872..818633d06 100644
--- a/src/attributes/stealth.test.c
+++ b/src/attributes/stealth.test.c
@@ -11,12 +11,11 @@
 #include <stdlib.h>
 #include <assert.h>
 
-void test_stealth(CuTest *tc) {
+static void test_stealth(CuTest *tc) {
     unit *u;
 
     test_cleanup();
-    test_create_world();
-    u = test_create_unit(test_create_faction(test_create_race("human")), findregion(0, 0));
+    u = test_create_unit(test_create_faction(test_create_race("human")), test_create_region(0, 0, 0));
     set_level(u, SK_STEALTH, 2);
     CuAssertIntEquals(tc, -1, u_geteffstealth(u));
     CuAssertIntEquals(tc, 2, eff_stealth(u, u->region));
diff --git a/src/battle.test.c b/src/battle.test.c
index 8d8f83b8a..02213d35b 100644
--- a/src/battle.test.c
+++ b/src/battle.test.c
@@ -25,8 +25,8 @@ static void test_make_fighter(CuTest * tc)
     const resource_type *rtype;
 
     test_cleanup();
-    test_create_world();
-    r = findregion(0, 0);
+    test_create_horse();
+    r = test_create_region(0, 0, 0);
     f = test_create_faction(NULL);
     au = test_create_unit(f, r);
     enable_skill(SK_MAGIC, true);
@@ -75,8 +75,7 @@ static void test_defenders_get_building_bonus(CuTest * tc)
     building_type * btype;
 
     test_cleanup();
-    test_create_world();
-    r = findregion(0, 0);
+    r = test_create_region(0, 0, 0);
     btype = bt_get_or_create("castle");
     btype->protection = &add_two;
     bld = test_create_building(r, btype);
@@ -120,8 +119,7 @@ static void test_attackers_get_no_building_bonus(CuTest * tc)
     building_type * btype;
 
     test_cleanup();
-    test_create_world();
-    r = findregion(0, 0);
+    r = test_create_region(0, 0, 0);
     btype = bt_get_or_create("castle");
     btype->protection = &add_two;
     bld = test_create_building(r, btype);
@@ -151,8 +149,7 @@ static void test_building_bonus_respects_size(CuTest * tc)
     faction * f;
 
     test_cleanup();
-    test_create_world();
-    r = findregion(0, 0);
+    r = test_create_region(0, 0, 0);
     btype = bt_get_or_create("castle");
     btype->protection = &add_two;
     bld = test_create_building(r, btype);
diff --git a/src/give.test.c b/src/give.test.c
index 517411c4c..76726c044 100644
--- a/src/give.test.c
+++ b/src/give.test.c
@@ -308,7 +308,7 @@ static void test_give_okay(CuTest * tc) {
     env.f2 = env.f1 = test_create_faction(0);
     setup_give(&env);
 
-    set_param(&global.parameters, "rules.give", "0");
+    set_param(&global.parameters, "rules.give.flags", "0");
     CuAssertPtrEquals(tc, 0, check_give(env.src, env.dst, 0));
     test_cleanup();
 }
@@ -322,7 +322,7 @@ static void test_give_denied_by_rules(CuTest * tc) {
     env.f2 = test_create_faction(0);
     setup_give(&env);
 
-    set_param(&global.parameters, "rules.give", "0");
+    set_param(&global.parameters, "rules.give.flags", "0");
     CuAssertPtrNotNull(tc, msg = check_give(env.src, env.dst, 0));
     msg_release(msg);
     test_cleanup();
diff --git a/src/kernel/build.c b/src/kernel/build.c
index c81e610d7..76821a190 100644
--- a/src/kernel/build.c
+++ b/src/kernel/build.c
@@ -821,7 +821,7 @@ build_building(unit * u, const building_type * btype, int id, int want, order *
         /* gebäude fertig */
         new_order = default_order(lang);
     }
-    else if (want != INT_MAX) {
+    else if (want != INT_MAX && btname) {
         /* reduzierte restgröße */
         const char *hasspace = strchr(btname, ' ');
         if (hasspace) {
diff --git a/src/kernel/build.test.c b/src/kernel/build.test.c
index b879295e1..8e26d86c5 100644
--- a/src/kernel/build.test.c
+++ b/src/kernel/build.test.c
@@ -27,10 +27,14 @@ typedef struct build_fixture {
 
 static unit * setup_build(build_fixture *bf) {
     test_cleanup();
-    test_create_world();
+    init_resources();
+
+    test_create_itemtype("stone");
+    test_create_buildingtype("castle");
     bf->rc = test_create_race("human");
-    bf->r = findregion(0, 0);
+    bf->r = test_create_region(0, 0, 0);
     bf->f = test_create_faction(bf->rc);
+    bf->f->locale = get_or_create_locale("de");
     assert(bf->rc && bf->f && bf->r);
     bf->u = test_create_unit(bf->f, bf->r);
     assert(bf->u);
@@ -134,6 +138,7 @@ static void test_build_limits(CuTest *tc) {
 
     u = setup_build(&bf);
     rtype = bf.cons.materials[0].rtype;
+    assert(rtype);
     i_change(&u->items, rtype->itype, 1);
     set_level(u, SK_ARMORER, bf.cons.minskill);
     CuAssertIntEquals(tc, 1, build(u, &bf.cons, 0, 10));
diff --git a/src/kernel/config.c b/src/kernel/config.c
index 69d09b040..14ca56242 100644
--- a/src/kernel/config.c
+++ b/src/kernel/config.c
@@ -1160,11 +1160,13 @@ void set_param(struct param **p, const char *key, const char *data)
         }
         p = &(*p)->next;
     }
-    par = malloc(sizeof(param));
-    par->name = _strdup(key);
-    par->data = _strdup(data);
-    par->next = *p;
-    *p = par;
+    if (data) {
+        par = malloc(sizeof(param));
+        par->name = _strdup(key);
+        par->data = _strdup(data);
+        par->next = *p;
+        *p = par;
+    }
 }
 
 void kernel_done(void)
@@ -1327,12 +1329,24 @@ int cmp_current_owner(const building * b, const building * a)
     return -1;
 }
 
-bool rule_stealth_faction(void)
+bool rule_stealth_other(void)
 {
     static int gamecookie = -1;
     static int rule = -1;
     if (rule < 0 || gamecookie != global.cookie) {
-        rule = get_param_int(global.parameters, "rules.stealth.faction", 1);
+        rule = get_param_int(global.parameters, "stealth.faction.other", 1);
+        gamecookie = global.cookie;
+        assert(rule >= 0);
+    }
+    return rule != 0;
+}
+
+bool rule_stealth_anon(void)
+{
+    static int gamecookie = -1;
+    static int rule = -1;
+    if (rule < 0 || gamecookie != global.cookie) {
+        rule = get_param_int(global.parameters, "stealth.faction.anon", 1);
         gamecookie = global.cookie;
         assert(rule >= 0);
     }
@@ -1351,13 +1365,13 @@ bool rule_region_owners(void)
     return rule!=0;
 }
 
-int rule_auto_taxation(void)
+bool rule_auto_taxation(void)
 {
     static int gamecookie = -1;
     static int rule = -1;
     if (rule < 0 || gamecookie != global.cookie) {
         rule =
-            get_param_int(global.parameters, "rules.economy.taxation", TAX_ORDER);
+            get_param_int(global.parameters, "rules.economy.taxation", 0);
         gamecookie = global.cookie;
         assert(rule >= 0);
     }
@@ -1659,10 +1673,10 @@ int entertainmoney(const region * r)
 
 int rule_give(void)
 {
-    return get_param_int(global.parameters, "rules.give", GIVE_DEFAULT);
+    return get_param_int(global.parameters, "rules.give.flags", GIVE_DEFAULT);
 }
 
-int markets_module(void)
+bool markets_module(void)
 {
     return get_param_int(global.parameters, "modules.markets", 0);
 }
diff --git a/src/kernel/config.h b/src/kernel/config.h
index 9449744ef..5eddd1ff3 100644
--- a/src/kernel/config.h
+++ b/src/kernel/config.h
@@ -153,15 +153,14 @@ extern "C" {
 
     bool rule_transfermen(void);
     bool rule_region_owners(void);
-    bool rule_stealth_faction(void);
+    bool rule_stealth_other(void); // units can pretend to be another faction, TARNE PARTEI <no>
+    bool rule_stealth_anon(void);  // units can anonymize their faction, TARNE PARTEI [NICHT]
     int rule_alliance_limit(void);
     int rule_faction_limit(void);
 #define HARVEST_WORK  0x00
 #define HARVEST_TAXES 0x01
     int rule_blessed_harvest(void);
-#define TAX_ORDER 0x00
-#define TAX_OWNER 0x01
-    int rule_auto_taxation(void);
+    bool rule_auto_taxation(void);
 #define GIVE_SELF 1
 #define GIVE_PEASANTS 2
 #define GIVE_LUXURIES 4
@@ -227,7 +226,7 @@ extern "C" {
     int besieged(const struct unit *u);
     int maxworkingpeasants(const struct region *r);
     bool has_horses(const struct unit *u);
-    int markets_module(void);
+    bool markets_module(void);
     int wage(const struct region *r, const struct faction *f,
         const struct race *rc, int in_turn);
     int maintenance_cost(const struct unit *u);
diff --git a/src/kernel/faction.c b/src/kernel/faction.c
index fe4a7ad38..c5ecbcb43 100755
--- a/src/kernel/faction.c
+++ b/src/kernel/faction.c
@@ -402,16 +402,16 @@ void destroyfaction(faction * f)
 
     /* units of other factions that were disguised as this faction
      * have their disguise replaced by ordinary faction hiding. */
-    if (rule_stealth_faction()) {
+    if (rule_stealth_other()) {
         region *rc;
         for (rc = regions; rc; rc = rc->next) {
             for (u = rc->units; u; u = u->next) {
                 attrib *a = a_find(u->attribs, &at_otherfaction);
-                if (!a)
-                    continue;
-                if (get_otherfaction(a) == f) {
+                if (a && get_otherfaction(a) == f) {
                     a_removeall(&u->attribs, &at_otherfaction);
-                    fset(u, UFL_ANON_FACTION);
+                    if (rule_stealth_anon()) {
+                        fset(u, UFL_ANON_FACTION);
+                    }
                 }
             }
         }
diff --git a/src/kernel/save.c b/src/kernel/save.c
index cdec5f9a4..201b710aa 100644
--- a/src/kernel/save.c
+++ b/src/kernel/save.c
@@ -687,7 +687,7 @@ unit *read_unit(struct gamedata *data)
     setstatus(u, n);
     READ_INT(data->store, &u->flags);
     u->flags &= UFL_SAVEMASK;
-    if ((u->flags & UFL_ANON_FACTION) && !rule_stealth_faction()) {
+    if ((u->flags & UFL_ANON_FACTION) && !rule_stealth_anon()) {
         /* if this rule is broken, then fix broken units */
         u->flags -= UFL_ANON_FACTION;
         log_warning("%s was anonymous.\n", unitname(u));
@@ -1929,6 +1929,7 @@ gamedata *gamedata_open(const char *filename, const char *mode) {
             return data;
         }
     }
+    log_error("could not open %s: %s", filename, strerror(errno));
     return 0;
 }
 
diff --git a/src/spells.c b/src/spells.c
index 48b86a9b4..4a3b81d7a 100644
--- a/src/spells.c
+++ b/src/spells.c
@@ -2188,7 +2188,7 @@ static int sp_ironkeeper(castorder * co)
     guard(keeper, GUARD_MINING);
     fset(keeper, UFL_ISNEW);
     /* Parteitarnen, damit man nicht sofort weiß, wer dahinter steckt */
-    if (rule_stealth_faction()) {
+    if (rule_stealth_anon()) {
         fset(keeper, UFL_ANON_FACTION);
     }
 
@@ -3630,7 +3630,7 @@ static int sp_charmingsong(castorder * co)
 
     /* setze Parteitarnung, damit nicht sofort klar ist, wer dahinter
      * steckt */
-    if (rule_stealth_faction()) {
+    if (rule_stealth_anon()) {
         fset(target, UFL_ANON_FACTION);
     }
 
@@ -4377,7 +4377,7 @@ static int sp_raisepeasants(castorder * co)
         LOC(mage->faction->locale, "furious_mob"), mage);
 
     fset(u2, UFL_LOCKED);
-    if (rule_stealth_faction()) {
+    if (rule_stealth_anon()) {
         fset(u2, UFL_ANON_FACTION);
     }
 
diff --git a/src/spy.c b/src/spy.c
index 6249ab6b8..e25ff1e85 100644
--- a/src/spy.c
+++ b/src/spy.c
@@ -215,7 +215,7 @@ int setstealth_cmd(unit * u, struct order *ord)
 {
     char token[64];
     const char *s;
-    int level, rule;
+    int level;
 
     init_order(ord);
     s = gettoken(token, sizeof(token));
@@ -288,13 +288,8 @@ int setstealth_cmd(unit * u, struct order *ord)
     switch (findparam(s, u->faction->locale)) {
     case P_FACTION:
         /* TARNE PARTEI [NICHT|NUMMER abcd] */
-        rule = rule_stealth_faction();
-        if (!rule) {
-            /* TARNE PARTEI is disabled */
-            break;
-        }
         s = gettoken(token, sizeof(token));
-        if (rule & 1) {
+        if (rule_stealth_anon()) {
             if (!s || *s == 0) {
                 fset(u, UFL_ANON_FACTION);
                 break;
@@ -304,7 +299,7 @@ int setstealth_cmd(unit * u, struct order *ord)
                 break;
             }
         }
-        if (rule & 2) {
+        if (rule_stealth_other()) {
             if (get_keyword(s, u->faction->locale) == K_NUMBER) {
                 s = gettoken(token, sizeof(token));
                 int nr = -1;
diff --git a/src/test_eressea.c b/src/test_eressea.c
index 2a0bf04eb..c04764992 100644
--- a/src/test_eressea.c
+++ b/src/test_eressea.c
@@ -121,6 +121,7 @@ int RunAllTests(int argc, char *argv[])
     ADD_SUITE(move);
     ADD_SUITE(piracy);
     ADD_SUITE(stealth);
+    ADD_SUITE(otherfaction);
     ADD_SUITE(upkeep);
     ADD_SUITE(vortex);
     ADD_SUITE(wormhole);
diff --git a/src/tests.c b/src/tests.c
index 4e0206189..8cf97bede 100644
--- a/src/tests.c
+++ b/src/tests.c
@@ -45,7 +45,7 @@ struct region *test_create_region(int x, int y, const terrain_type *terrain)
     if (!terrain) {
         terrain_type *t = get_or_create_terrain("plain");
         t->size = 1000;
-        fset(t, LAND_REGION);
+        fset(t, LAND_REGION|CAVALRY_REGION|FOREST_REGION);
         terraform_region(r, t);
     } else
         terraform_region(r, terrain);
@@ -196,6 +196,16 @@ void test_translate_param(const struct locale *lang, param_t param, const char *
     add_translation(cb, text, param);
 }
 
+
+item_type *test_create_horse(void) {
+    item_type * itype;
+    itype = test_create_itemtype("horse");
+    itype->flags |= ITF_BIG | ITF_ANIMAL;
+    itype->weight = 5000;
+    itype->capacity = 7000;
+    return itype;
+}
+
 /** creates a small world and some stuff in it.
  * two terrains: 'plain' and 'ocean'
  * one race: 'human'
@@ -216,10 +226,7 @@ void test_create_world(void)
     locale_setstring(loc, "money", "SILBER");
     init_resources();
 
-    itype = test_create_itemtype("horse");
-    itype->flags |= ITF_BIG | ITF_ANIMAL;
-    itype->weight = 5000;
-    itype->capacity = 7000;
+    test_create_horse();
 
     itype = test_create_itemtype("cart");
     itype->flags |= ITF_BIG | ITF_VEHICLE;
diff --git a/src/tests.h b/src/tests.h
index ba33dd5a7..f0b64729b 100644
--- a/src/tests.h
+++ b/src/tests.h
@@ -34,6 +34,7 @@ extern "C" {
     struct faction *test_create_faction(const struct race *rc);
     struct unit *test_create_unit(struct faction *f, struct region *r);
     void test_create_world(void);
+    struct item_type * test_create_horse(void);
     struct building * test_create_building(struct region * r, const struct building_type * btype);
     struct ship * test_create_ship(struct region * r, const struct ship_type * stype);
     struct item_type * test_create_itemtype(const char * name);