diff --git a/build.gradle.kts b/build.gradle.kts
index 65f9511..7dd499b 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -24,4 +24,17 @@ dependencies {
     detektPlugins(libs.detekt.ktlint)
     testImplementation(libs.mockk)
     testImplementation(libs.kotest.runner)
+    testImplementation(libs.mockbukkit)
+    testImplementation("io.papermc.paper:paper-api:$buildPaperVersion.build.+")
+}
+
+tasks.withType<Test> {
+    useJUnitPlatform()
+    systemProperty("bstats.relocatecheck", "false")
+    systemProperty("kotest.framework.classpath.scanning.autoscan.disable", "true")
+    systemProperty("kotest.framework.coroutine.test.scope", "false")
+    testLogging {
+        events("passed", "skipped", "failed")
+        showStandardStreams = true
+    }
 }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 284f83a..e363d4b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -15,6 +15,7 @@ modrinth = "2.8.7"
 buildconfig = "5.6.7"
 mockk = "1.14.2"
 kotest = "5.9.1"
+mockbukkit = "4.113.1"
 
 [libraries]
 paper-api = { module = "io.papermc.paper:paper-api", version = "26.1.2.build.+" }
@@ -30,6 +31,7 @@ mysql-connector = { module = "com.mysql:mysql-connector-j", version.ref = "mysql
 detekt-ktlint = { module = "dev.detekt:detekt-rules-ktlint-wrapper", version.ref = "detekt" }
 mockk = { module = "io.mockk:mockk", version.ref = "mockk" }
 kotest-runner = { module = "io.kotest:kotest-runner-junit5", version.ref = "kotest" }
+mockbukkit = { module = "org.mockbukkit.mockbukkit:mockbukkit-v26.1.2", version.ref = "mockbukkit" }
 
 [plugins]
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
diff --git a/src/main/kotlin/xyz/atrius/waystones/Waystones.kt b/src/main/kotlin/xyz/atrius/waystones/Waystones.kt
index 1b4ddfd..993c004 100644
--- a/src/main/kotlin/xyz/atrius/waystones/Waystones.kt
+++ b/src/main/kotlin/xyz/atrius/waystones/Waystones.kt
@@ -15,7 +15,7 @@ typealias KoinApp =
     org.koin.core.KoinApplication
 
 @PluginEntrypoint
-class Waystones : KotlinPlugin() {
+open class Waystones : KotlinPlugin() {
 
     private lateinit var koin: KoinApp
 
@@ -36,4 +36,6 @@ class Waystones : KotlinPlugin() {
     override fun onDisable() {
         koin.koin.get<WaystonesInitializer>().disable(this)
     }
+
+    internal fun getKoinApp(): KoinApp = koin
 }
diff --git a/src/main/kotlin/xyz/atrius/waystones/manager/AdvancementManager.kt b/src/main/kotlin/xyz/atrius/waystones/manager/AdvancementManager.kt
index ab8382f..1fbe26b 100644
--- a/src/main/kotlin/xyz/atrius/waystones/manager/AdvancementManager.kt
+++ b/src/main/kotlin/xyz/atrius/waystones/manager/AdvancementManager.kt
@@ -39,7 +39,11 @@ class AdvancementManager(
 
         for (item in current) {
             logger.info("Loading advancement '${item.namespacedKey().asString()}'")
-            server.unsafe.loadAdvancement(item.namespacedKey(), gson.toJson(item.asAdvancement))
+            runCatching {
+                server.unsafe.loadAdvancement(item.namespacedKey(), gson.toJson(item.asAdvancement))
+            }.onFailure {
+                logger.warn("Failed to load advancement: ${it.message}")
+            }
             load(groups, item.namespacedKey().asString())
         }
     }
diff --git a/src/test/kotlin/xyz/atrius/waystones/test/ProjectConfig.kt b/src/test/kotlin/xyz/atrius/waystones/test/ProjectConfig.kt
new file mode 100644
index 0000000..ae5858c
--- /dev/null
+++ b/src/test/kotlin/xyz/atrius/waystones/test/ProjectConfig.kt
@@ -0,0 +1,12 @@
+package xyz.atrius.waystones.test
+
+import io.kotest.core.config.AbstractProjectConfig
+
+/**
+ * Project-wide Kotest configuration.
+ * Ensures all tests run sequentially for MockBukkit compatibility.
+ */
+object ProjectConfig : AbstractProjectConfig() {
+    override val concurrentSpecs = 1
+    override val concurrentTests = 1
+}
diff --git a/src/test/kotlin/xyz/atrius/waystones/test/ServerFunSpec.kt b/src/test/kotlin/xyz/atrius/waystones/test/ServerFunSpec.kt
new file mode 100644
index 0000000..071b7ed
--- /dev/null
+++ b/src/test/kotlin/xyz/atrius/waystones/test/ServerFunSpec.kt
@@ -0,0 +1,155 @@
+package xyz.atrius.waystones.test
+
+import io.kotest.core.extensions.SpecExtension
+import io.kotest.core.spec.Spec
+import io.kotest.core.spec.style.FunSpec
+import org.bukkit.Location
+import org.bukkit.Material
+import org.bukkit.World
+import org.bukkit.block.Block
+import org.bukkit.command.CommandSender
+import org.bukkit.entity.Player
+import org.bukkit.event.block.Action
+import org.bukkit.event.player.PlayerInteractEvent
+import org.bukkit.inventory.ItemStack
+import org.mockbukkit.mockbukkit.MockBukkit
+import org.mockbukkit.mockbukkit.ServerMock
+import xyz.atrius.waystones.Waystones
+
+/**
+ * Base test class that manages a full MockBukkit server lifecycle.
+ *
+ * Each test spec gets:
+ * - A fresh MockBukkit server instance
+ * - The Waystones plugin loaded with full Koin DI
+ * - A temporary SQLite database (auto-cleaned)
+ * - Access to all plugin services via Koin
+ *
+ * Usage:
+ * ```
+ * class MyTest : ServerFunSpec({
+ *     test("something works") {
+ *         val player = createPlayer()
+ *         val world = createWorld()
+ *         val waystone = placeWaystone(world)
+ *         // ... assertions
+ *     }
+ * })
+ * ```
+ */
+abstract class ServerFunSpec private constructor() : FunSpec() {
+
+    private var _server: ServerMock? = null
+    private var _plugin: Waystones? = null
+    private var _koin: org.koin.core.Koin? = null
+
+    internal val server: ServerMock get() = _server!!
+    internal val plugin: Waystones get() = _plugin!!
+    internal val koin: org.koin.core.Koin get() = _koin!!
+
+    constructor(body: ServerFunSpec.() -> Unit = {}) : this() {
+        extensions(
+            object : SpecExtension {
+                override suspend fun intercept(spec: Spec, execute: suspend (Spec) -> Unit) {
+                    _server = MockBukkit.mock()
+                    _plugin = MockBukkit.load(Waystones::class.java)
+                    _koin = _plugin!!.getKoinApp().koin
+
+                    try {
+                        execute(spec)
+                    } finally {
+                        MockBukkit.unmock()
+                    }
+                }
+            }
+        )
+        body()
+    }
+
+    /** Resolve a bean from the Koin container. Throws if not found. */
+    internal inline fun <reified T : Any> get(): T = koin.get()
+
+    /** Resolve a bean from the Koin container, or null if not found. */
+    internal inline fun <reified T : Any> getOrNull(): T? = koin.getOrNull()
+
+    /** Create a regular player. */
+    internal fun createPlayer(name: String = "TestPlayer"): Player =
+        server.addPlayer(name)
+
+    /** Create an operator player. */
+    internal fun createOpPlayer(name: String = "TestOp"): Player =
+        server.addPlayer(name).also { it.isOp = true }
+
+    /** Create a simple flat world. */
+    internal fun createWorld(name: String = "test_world"): World =
+        server.addSimpleWorld(name)
+
+    /** Create a location in a world. */
+    internal fun createLocation(
+        world: World,
+        x: Int = 0,
+        y: Int = 64,
+        z: Int = 0,
+    ): Location = Location(world, x.toDouble(), y.toDouble(), z.toDouble())
+
+
+    /** Place a block at the given coordinates. */
+    internal fun placeBlock(
+        world: World,
+        x: Int = 0,
+        y: Int = 64,
+        z: Int = 0,
+        material: Material,
+    ): Block = world.getBlockAt(x, y, z).also { it.type = material }
+
+    /** Place a waystone (lodestone) at the given coordinates. */
+    internal fun placeWaystone(
+        world: World,
+        x: Int = 0,
+        y: Int = 64,
+        z: Int = 0,
+    ): Block = placeBlock(world, x, y, z, Material.LODESTONE)
+
+    /** Simulate a right-click on a block with an optional item in hand. */
+    internal fun simulateRightClick(
+        player: Player,
+        block: Block,
+        item: ItemStack? = null,
+    ): PlayerInteractEvent = PlayerInteractEvent(
+        player,
+        Action.RIGHT_CLICK_BLOCK,
+        item,
+        block,
+        org.bukkit.block.BlockFace.UP,
+    ).also { server.pluginManager.callEvent(it) }
+
+    /** Execute a command as the given sender. */
+    internal fun executeCommand(
+        sender: CommandSender,
+        command: String,
+    ): CommandResult {
+        val commandMap = server.commandMap
+        val parts = command.split(" ", limit = 2)
+        val cmd = commandMap.getCommand(parts[0])
+        val args = if (parts.size > 1) parts[1].split(" ").toTypedArray() else emptyArray()
+        val success = cmd != null && cmd.execute(sender, parts[0], args)
+        return CommandResult(success, "")
+    }
+
+    /** Execute a command as a player. */
+    internal fun executePlayerCommand(
+        player: Player,
+        command: String,
+    ): CommandResult = executeCommand(player, command)
+
+    /** Execute a command from the server console. */
+    internal fun executeConsoleCommand(
+        command: String,
+    ): CommandResult = executeCommand(server.consoleSender, command)
+}
+
+/** Result of a command execution. */
+data class CommandResult(
+    val success: Boolean,
+    val output: String,
+)
diff --git a/src/test/kotlin/xyz/atrius/waystones/test/ServerFunSpecTest.kt b/src/test/kotlin/xyz/atrius/waystones/test/ServerFunSpecTest.kt
new file mode 100644
index 0000000..53556bc
--- /dev/null
+++ b/src/test/kotlin/xyz/atrius/waystones/test/ServerFunSpecTest.kt
@@ -0,0 +1,16 @@
+package xyz.atrius.waystones.test
+
+import io.kotest.matchers.shouldBe
+import io.kotest.matchers.shouldNotBe
+import xyz.atrius.waystones.manager.LocalizationManager
+
+class ServerFunSpecTest : ServerFunSpec({
+
+    test("Server and plugin are initialized") {
+        plugin.isEnabled shouldBe true
+    }
+
+    test("Koin container is accessible") {
+        get<LocalizationManager>() shouldNotBe null
+    }
+})