diff --git a/test/common.js b/test/common.js
index c828cb341b2a..912d527efc64 100644
--- a/test/common.js
+++ b/test/common.js
@@ -95,17 +95,19 @@ class TestTools {
 	 *
 	 * @param {Object} [options]
 	 * @param {Team[]} [teams]
-	 * @param {PRNG} [prng] A pseudo-random number generator. If not provided, a pseudo-random number
-	 * generator will be generated for the user with a seed that is guaranteed to be the same across
-	 * test executions to help with determinism.
 	 * @returns {Sim.Battle} A battle.
 	 */
-	createBattle(options, teams, prng = new PRNG(DEFAULT_SEED)) {
+	createBattle(options, teams) {
 		if (Array.isArray(options)) {
 			teams = options;
 			options = {};
 		}
-		const format = this.getFormat(options || {});
+		if (!options) options = {};
+		// If a seed for the pseudo-random number generator is not provided,
+		// a default seed (guaranteed to be the same across test executions)
+		// will be used. The default seed is intentionally tuned
+		let prng = new PRNG(options.seed || DEFAULT_SEED);
+		const format = this.getFormat(options);
 		const battle = Sim.construct(
 			format.id,
 			undefined,
diff --git a/test/simulator/abilities/dancer.js b/test/simulator/abilities/dancer.js
index d000c8ac3141..59a8f3e3337c 100644
--- a/test/simulator/abilities/dancer.js
+++ b/test/simulator/abilities/dancer.js
@@ -2,7 +2,6 @@
 
 const assert = require('./../../assert');
 const common = require('./../../common');
-const PRNG = require('./../../../sim/prng');
 
 let battle;
 
@@ -55,7 +54,7 @@ describe('Dancer', function () {
 	});
 
 	it('should not copy a move that failed or was blocked by Protect', function () {
-		battle = common.createBattle({gameType: 'doubles'}, null, new PRNG([1, 2, 3, 4]));
+		battle = common.createBattle({gameType: 'doubles', seed: [1, 2, 3, 4]});
 		const p1 = battle.join('p1', 'Guest 1', 1, [
 			{species: 'Oricorio', level: 98, ability: 'dancer', item: 'laggingtail', moves: ['dragondance', 'protect', 'teeterdance']},
 			{species: 'Oricorio', level: 99, ability: 'dancer', moves: ['featherdance']},
@@ -90,7 +89,7 @@ describe('Dancer', function () {
 	});
 
 	it('should not copy a move that missed', function () {
-		battle = common.createBattle({gameType: 'singles'}, null, new PRNG([1, 2, 3, 4]));
+		battle = common.createBattle({gameType: 'singles', seed: [1, 2, 3, 4]});
 		const p1 = battle.join('p1', 'Guest 1', 1, [{species: 'Oricorio', ability: 'dancer', item: 'choicescarf', moves: ['revelationdance']}]);
 		const p2 = battle.join('p2', 'Guest 2', 1, [{species: 'Oricorio', ability: 'dancer', item: 'brightpowder', moves: ['dig']}]);
 		p1.active[0].boostBy({accuracy: -6});
diff --git a/test/simulator/moves/miracleeye.js b/test/simulator/moves/miracleeye.js
index ff143fab7e8c..a4c6bbadc328 100644
--- a/test/simulator/moves/miracleeye.js
+++ b/test/simulator/moves/miracleeye.js
@@ -11,37 +11,41 @@ describe('Miracle Eye', function () {
 	});
 
 	it('should negate Psychic immunities', function () {
-		battle = common.createBattle();
-		battle.join('p1', 'Guest 1', 1, [{species: "Smeargle", ability: 'owntempo', moves: ['miracleeye', 'psychic']}]);
-		battle.join('p2', 'Guest 2', 1, [{species: "Darkrai", ability: 'baddreams', moves: ['nastyplot']}]);
-		battle.commitDecisions();
-		battle.choose('p1', 'move 2');
-		battle.commitDecisions();
+		battle = common.createBattle({seed: [1, 2, 3, 4]}, [[
+			{species: "Smeargle", moves: ['miracleeye', 'psychic']},
+		], [
+			{species: "Darkrai", moves: ['nastyplot']},
+		]]);
+		battle.makeChoices('move miracle eye', 'move nasty plot');
+		battle.makeChoices('move psychic', 'move nasty plot');
 		assert.notStrictEqual(battle.p2.active[0].hp, battle.p2.active[0].maxhp);
 	});
 
 	it('should ignore the effect of positive evasion stat stages', function () {
-		battle = common.createBattle();
-		battle.join('p1', 'Guest 1', 1, [{species: "Smeargle", ability: 'owntempo', moves: ['avalanche', 'miracleeye']}]);
-		battle.join('p2', 'Guest 2', 1, [{species: "Forretress", ability: 'sturdy', moves: ['synthesis']}]);
-		battle.choose('p1', 'move 2');
-		battle.commitDecisions();
+		battle = common.createBattle({seed: [1, 2, 3, 4]}, [[
+			{species: "Smeargle", moves: ['avalanche', 'miracleeye']},
+		], [
+			{species: "Forretress", moves: ['synthesis']},
+		]]);
+		battle.makeChoices('move miracle eye', 'move synthesis');
 		battle.boost({evasion: 6}, battle.p2.active[0]);
-		for (let i = 0; i < 16; i++) {
-			battle.commitDecisions();
+		for (let i = 0; i < 3; i++) {
+			battle.makeChoices('move avalanche', 'move synthesis');
 			assert.notStrictEqual(battle.p2.active[0].hp, battle.p2.active[0].maxhp);
 		}
 	});
 
 	it('should not ignore the effect of negative evasion stat stages', function () {
-		battle = common.createBattle();
-		battle.join('p1', 'Guest 1', 1, [{species: "Smeargle", ability: 'owntempo', moves: ['zapcannon', 'dynamicpunch', 'miracleeye']}]);
-		battle.join('p2', 'Guest 2', 1, [{species: "Zapdos", ability: 'owntempo', moves: ['roost']}]);
+		battle = common.createBattle({seed: [1, 2, 3, 4]}, [[
+			{species: "Smeargle", moves: ['zapcannon', 'miracleeye']},
+		], [
+			{species: "Zapdos", moves: ['roost']},
+		]]);
 		battle.choose('p1', 'move 3');
-		battle.commitDecisions();
+		battle.makeChoices('move miracle eye', 'move roost');
 		battle.boost({spe: 6, evasion: -6}, battle.p2.active[0]);
-		for (let i = 0; i < 16; i++) {
-			battle.commitDecisions();
+		for (let i = 0; i < 3; i++) {
+			battle.makeChoices('move zap cannon', 'move roost');
 			assert.notStrictEqual(battle.p2.active[0].hp, battle.p2.active[0].maxhp);
 		}
 	});