diff --git a/package.json b/package.json
index 3b09aa70af..fc02c18271 100644
--- a/package.json
+++ b/package.json
@@ -97,7 +97,7 @@
     "test:common": "nyc --silent --no-clean mocha test/common --recursive",
     "test:content": "nyc --silent --no-clean mocha test/content --recursive",
     "test:nodemon": "gulp test:nodemon",
-    "coverage": "nyc report --reporter=html --report-dir coverage/results; open coverage.html",
+    "coverage": "nyc report --reporter=html --report-dir coverage/results; open coverage/results/index.html",
     "sprites": "gulp sprites:compile",
     "client:dev": "cd website/client && npm run serve",
     "client:build": "cd website/client && npm run build",
diff --git a/test/common/ops/buy/buy.js b/test/common/ops/buy/buy.test.js
similarity index 99%
rename from test/common/ops/buy/buy.js
rename to test/common/ops/buy/buy.test.js
index 2ac5fc6407..ff553f1aac 100644
--- a/test/common/ops/buy/buy.js
+++ b/test/common/ops/buy/buy.test.js
@@ -49,7 +49,7 @@ describe('shared.ops.buy', () => {
     }
   });
 
-  it('recovers 15 hp', async () => {
+  it('buys health potion', async () => {
     user.stats.hp = 30;
     await buy(user, { params: { key: 'potion' } }, analytics);
     expect(user.stats.hp).to.eql(45);
diff --git a/test/common/ops/buy/buyArmoire.js b/test/common/ops/buy/buyArmoire.test.js
similarity index 100%
rename from test/common/ops/buy/buyArmoire.js
rename to test/common/ops/buy/buyArmoire.test.js
diff --git a/test/common/ops/buy/buyGem.js b/test/common/ops/buy/buyGem.test.js
similarity index 100%
rename from test/common/ops/buy/buyGem.js
rename to test/common/ops/buy/buyGem.test.js
diff --git a/test/common/ops/buy/buyHealthPotion.js b/test/common/ops/buy/buyHealthPotion.test.js
similarity index 100%
rename from test/common/ops/buy/buyHealthPotion.js
rename to test/common/ops/buy/buyHealthPotion.test.js
diff --git a/test/common/ops/buy/buyMarketGear.js b/test/common/ops/buy/buyMarketGear.test.js
similarity index 81%
rename from test/common/ops/buy/buyMarketGear.js
rename to test/common/ops/buy/buyMarketGear.test.js
index 37725ff1b1..82d9b9ef53 100644
--- a/test/common/ops/buy/buyMarketGear.js
+++ b/test/common/ops/buy/buyMarketGear.test.js
@@ -22,6 +22,7 @@ async function buyGear (user, req, analytics) {
 describe('shared.ops.buyMarketGear', () => {
   let user;
   const analytics = { track () {} };
+  let clock;
 
   beforeEach(() => {
     user = generateUser({
@@ -54,6 +55,10 @@ describe('shared.ops.buyMarketGear', () => {
     shared.fns.predictableRandom.restore();
     shared.onboarding.checkOnboardingStatus.restore();
     analytics.track.restore();
+
+    if (clock) {
+      clock.restore();
+    }
   });
 
   context('Gear', () => {
@@ -184,30 +189,28 @@ describe('shared.ops.buyMarketGear', () => {
     });
 
     // TODO after user.ops.equip is done
-    xit('removes one-handed weapon and shield if auto-equip is on and a two-hander is bought', async () => {
+    it('removes one-handed weapon and shield if auto-equip is on and a two-hander is bought', async () => {
       user.stats.gp = 100;
       user.preferences.autoEquip = true;
-      await buyGear(user, { params: { key: 'shield_warrior_1' } });
-      user.ops.equip({ params: { key: 'shield_warrior_1' } });
-      await buyGear(user, { params: { key: 'weapon_warrior_1' } });
-      user.ops.equip({ params: { key: 'weapon_warrior_1' } });
+      user.items.gear.equipped.weapon = 'weapon_warrior_1';
+      user.items.gear.equipped.shield = 'shield_warrior_1';
+      user.stats.class = 'wizard';
 
-      await buyGear(user, { params: { key: 'weapon_wizard_1' } });
+      await buyGear(user, { params: { key: 'weapon_wizard_0' } });
 
       expect(user.items.gear.equipped).to.have.property('shield', 'shield_base_0');
-      expect(user.items.gear.equipped).to.have.property('weapon', 'weapon_wizard_1');
+      expect(user.items.gear.equipped).to.have.property('weapon', 'weapon_wizard_0');
     });
 
     // TODO after user.ops.equip is done
-    xit('buyGears two-handed equipment but does not automatically remove sword or shield', async () => {
+    it('buyGears two-handed equipment but does not automatically remove sword or shield', async () => {
       user.stats.gp = 100;
       user.preferences.autoEquip = false;
-      await buyGear(user, { params: { key: 'shield_warrior_1' } });
-      user.ops.equip({ params: { key: 'shield_warrior_1' } });
-      await buyGear(user, { params: { key: 'weapon_warrior_1' } });
-      user.ops.equip({ params: { key: 'weapon_warrior_1' } });
+      user.items.gear.equipped.weapon = 'weapon_warrior_1';
+      user.items.gear.equipped.shield = 'shield_warrior_1';
+      user.stats.class = 'wizard';
 
-      await buyGear(user, { params: { key: 'weapon_wizard_1' } });
+      await buyGear(user, { params: { key: 'weapon_wizard_0' } });
 
       expect(user.items.gear.equipped).to.have.property('shield', 'shield_warrior_1');
       expect(user.items.gear.equipped).to.have.property('weapon', 'weapon_warrior_1');
@@ -283,5 +286,40 @@ describe('shared.ops.buyMarketGear', () => {
 
       expect(user.items.gear.owned).to.have.property('shield_armoire_ramHornShield', true);
     });
+
+    it('buys current seasonal gear', async () => {
+      user.stats.gp = 200;
+      clock = sinon.useFakeTimers(new Date('2024-01-01'));
+
+      await buyGear(user, { params: { key: 'armor_special_winter2024Warrior' } });
+
+      expect(user.items.gear.owned).to.have.property('armor_special_winter2024Warrior', true);
+    });
+
+    it('errors when buying past seasonal gear', async () => {
+      clock = sinon.useFakeTimers(new Date('2024-01-01'));
+      user.stats.gp = 200;
+
+      try {
+        await buyGear(user, { params: { key: 'armor_special_winter2023Warrior' } });
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.equal(i18n.t('notAvailable'));
+        expect(user.items.gear.owned).to.not.have.property('armor_special_winter2023Warrior');
+      }
+    });
+
+    it('errors when buying gear from wrong season', async () => {
+      clock = sinon.useFakeTimers(new Date('2024-01-01'));
+      user.stats.gp = 200;
+
+      try {
+        await buyGear(user, { params: { key: 'weapon_special_spring2024Warrior' } });
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.equal(i18n.t('notAvailable'));
+        expect(user.items.gear.owned).to.not.have.property('weapon_special_spring2024Warrior');
+      }
+    });
   });
 });
diff --git a/test/common/ops/buy/buyMysterySet.js b/test/common/ops/buy/buyMysterySet.test.js
similarity index 71%
rename from test/common/ops/buy/buyMysterySet.js
rename to test/common/ops/buy/buyMysterySet.test.js
index 1a75de3451..f2d74046ba 100644
--- a/test/common/ops/buy/buyMysterySet.js
+++ b/test/common/ops/buy/buyMysterySet.test.js
@@ -15,6 +15,7 @@ import { errorMessage } from '../../../../website/common/script/libs/errorMessag
 describe('shared.ops.buyMysterySet', () => {
   let user;
   const analytics = { track () {} };
+  let clock;
 
   beforeEach(() => {
     user = generateUser({
@@ -31,6 +32,9 @@ describe('shared.ops.buyMysterySet', () => {
 
   afterEach(() => {
     analytics.track.restore();
+    if (clock) {
+      clock.restore();
+    }
   });
 
   context('Mystery Sets', () => {
@@ -41,7 +45,7 @@ describe('shared.ops.buyMysterySet', () => {
         } catch (err) {
           expect(err).to.be.an.instanceof(NotAuthorized);
           expect(err.message).to.eql(i18n.t('notEnoughHourglasses'));
-          expect(user.items.gear.owned).to.have.property('weapon_warrior_0', true);
+          expect(user.items.gear.owned).to.not.have.property('armor_mystery_201501');
         }
       });
 
@@ -72,6 +76,18 @@ describe('shared.ops.buyMysterySet', () => {
           expect(err.message).to.equal(errorMessage('missingKeyParam'));
         }
       });
+
+      it('returns error if the set is not available', async () => {
+        user.purchased.plan.consecutive.trinkets = 1;
+        clock = sinon.useFakeTimers(new Date('2024-01-16'));
+        try {
+          await buyMysterySet(user, { params: { key: '201501' } });
+        } catch (err) {
+          expect(err).to.be.an.instanceof(NotAuthorized);
+          expect(err.message).to.eql(i18n.t('notAvailable'));
+          expect(user.items.gear.owned).to.not.have.property('armor_mystery_201501');
+        }
+      });
     });
 
     context('successful purchases', () => {
@@ -86,6 +102,16 @@ describe('shared.ops.buyMysterySet', () => {
         expect(user.items.gear.owned).to.have.property('head_mystery_301404', true);
         expect(user.items.gear.owned).to.have.property('eyewear_mystery_301404', true);
       });
+
+      it('buys mystery set if it is available', async () => {
+        clock = sinon.useFakeTimers(new Date('2024-01-16'));
+        user.purchased.plan.consecutive.trinkets = 1;
+        await buyMysterySet(user, { params: { key: '201601' } }, analytics);
+
+        expect(user.purchased.plan.consecutive.trinkets).to.eql(0);
+        expect(user.items.gear.owned).to.have.property('shield_mystery_201601', true);
+        expect(user.items.gear.owned).to.have.property('head_mystery_201601', true);
+      });
     });
   });
 });
diff --git a/test/common/ops/buy/buyQuestGold.js b/test/common/ops/buy/buyQuestGold.test.js
similarity index 100%
rename from test/common/ops/buy/buyQuestGold.js
rename to test/common/ops/buy/buyQuestGold.test.js
diff --git a/test/common/ops/buy/hourglassPurchase.js b/test/common/ops/buy/hourglassPurchase.test.js
similarity index 100%
rename from test/common/ops/buy/hourglassPurchase.js
rename to test/common/ops/buy/hourglassPurchase.test.js
diff --git a/test/common/ops/buy/purchase.js b/test/common/ops/buy/purchase.test.js
similarity index 100%
rename from test/common/ops/buy/purchase.js
rename to test/common/ops/buy/purchase.test.js