diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 684924d0..a056568e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -61,4 +61,6 @@ jobs:
       run: npm install
 
     - name: Run tests
-      run: npm run mochaTest -- -g ${{ matrix.mcVersion }}v
+      run: npm run mochaTest
+      env:
+        MC_VERSION: ${{ matrix.mcVersion }}
diff --git a/test/benchmark.js b/test/benchmark.js
index 1d24cd75..82451bd7 100644
--- a/test/benchmark.js
+++ b/test/benchmark.js
@@ -3,9 +3,10 @@
 const ITERATIONS = 10000
 
 const mc = require('../')
+const testedVersions = require('./common/testedVersions')
 const states = mc.states
 
-for (const supportedVersion of mc.supportedVersions) {
+for (const supportedVersion of testedVersions) {
   const mcData = require('minecraft-data')(supportedVersion)
   const version = mcData.version
   const positionFlags = mcData.isNewerOrEqualTo('1.21.3') ? { flags: { onGround: true, hasHorizontalCollision: false } } : { onGround: true }
diff --git a/test/clientTest.js b/test/clientTest.js
index 63c2be29..afdaad81 100644
--- a/test/clientTest.js
+++ b/test/clientTest.js
@@ -9,13 +9,14 @@ const util = require('util')
 const applyClientHelpers = require('./common/clientHelpers')
 const download = util.promisify(require('minecraft-wrap').download)
 const { getPort } = require('./common/util')
+const testedVersions = require('./common/testedVersions')
 
 const SURVIVE_TIME = 10000
 const MC_SERVER_PATH = path.join(__dirname, 'server')
 
 const Wrap = require('minecraft-wrap').Wrap
 
-for (const supportedVersion of mc.supportedVersions) {
+for (const supportedVersion of testedVersions) {
   let PORT = null
   const mcData = require('minecraft-data')(supportedVersion)
   const version = mcData.version
diff --git a/test/common/testedVersions.js b/test/common/testedVersions.js
new file mode 100644
index 00000000..a9f0bf27
--- /dev/null
+++ b/test/common/testedVersions.js
@@ -0,0 +1,10 @@
+const mc = require('minecraft-protocol')
+
+// MC_VERSION names the one supported version to test; unset tests all of them.
+const only = process.env.MC_VERSION
+
+if (only && !mc.supportedVersions.includes(only)) {
+  throw new Error(`MC_VERSION is ${only}, which is not one of ${mc.supportedVersions.join(', ')}`)
+}
+
+module.exports = only ? [only] : mc.supportedVersions
diff --git a/test/cyclePacketTest.js b/test/cyclePacketTest.js
index 1a224d8d..06da9e99 100644
--- a/test/cyclePacketTest.js
+++ b/test/cyclePacketTest.js
@@ -1,6 +1,7 @@
 /* eslint-env mocha */
 // Tests packet serialization/deserialization from with raw binary from minecraft-packets
-const { createSerializer, createDeserializer, states, supportedVersions } = require('minecraft-protocol')
+const { createSerializer, createDeserializer, states } = require('minecraft-protocol')
+const supportedVersions = require('./common/testedVersions')
 const mcPackets = require('minecraft-packets')
 const assert = require('assert')
 
diff --git a/test/docTest.js b/test/docTest.js
index 1b3d80fe..43710a03 100644
--- a/test/docTest.js
+++ b/test/docTest.js
@@ -1,13 +1,13 @@
 /* eslint-env mocha */
 
-const mc = require('../')
 const fs = require('fs')
 const assert = require('assert')
 const path = require('path')
+const testedVersions = require('./common/testedVersions')
 
 const readmeContent = fs.readFileSync(path.join(__dirname, '/../docs/README.md'), { encoding: 'utf8', flag: 'r' })
 
-for (const supportedVersion of mc.supportedVersions) {
+for (const supportedVersion of testedVersions) {
   describe('doc ' + supportedVersion + 'v', function () {
     it('mentions the supported version in the readme', () => {
       assert.ok(readmeContent.includes(supportedVersion), `${supportedVersion} should be mentionned in the README.md but it is not`)
diff --git a/test/packetTest.js b/test/packetTest.js
index 9851fce2..75de8a83 100644
--- a/test/packetTest.js
+++ b/test/packetTest.js
@@ -9,6 +9,7 @@ const getFieldInfo = require('protodef').utils.getFieldInfo
 const getField = require('protodef').utils.getField
 
 const { getPort } = require('./common/util')
+const testedVersions = require('./common/testedVersions')
 
 function evalCount (count, fields) {
   if (fields[count.field] in count.map) { return count.map[fields[count.field]] }
@@ -467,7 +468,7 @@ function getValue (_type, packet) {
   }
 }
 
-for (const supportedVersion of mc.supportedVersions) {
+for (const supportedVersion of testedVersions) {
   let PORT
 
   const mcData = require('minecraft-data')(supportedVersion)
diff --git a/test/serverTest.js b/test/serverTest.js
index 95cb3382..81fc56cd 100644
--- a/test/serverTest.js
+++ b/test/serverTest.js
@@ -8,6 +8,7 @@ const nbt = require('prismarine-nbt')
 const applyClientHelpers = require('./common/clientHelpers')
 
 const { getPort } = require('./common/util')
+const testedVersions = require('./common/testedVersions')
 
 const w = nbt.comp({
   piglin_safe: nbt.byte(0),
@@ -25,7 +26,7 @@ const w = nbt.comp({
   has_ceiling: nbt.byte(0)
 })
 
-for (const supportedVersion of mc.supportedVersions) {
+for (const supportedVersion of testedVersions) {
   let PORT
   const mcData = require('minecraft-data')(supportedVersion)
   const version = mcData.version