diff --git a/tests/Server/ServerTestCase.php b/tests/Server/ServerTestCase.php
index 679191f..1a45c64 100644
--- a/tests/Server/ServerTestCase.php
+++ b/tests/Server/ServerTestCase.php
@@ -5,10 +5,12 @@ namespace LanguageServer\Tests\Server;
 
 use PHPUnit\Framework\TestCase;
 use LanguageServer\Tests\MockProtocolStream;
-use LanguageServer\{Server, LanguageClient, PhpDocumentLoader, DefinitionResolver};
+use LanguageServer\{Server, LanguageClient, PhpDocumentLoader, DefinitionResolver, Options, Indexer};
 use LanguageServer\Index\{ProjectIndex, StubsIndex, GlobalIndex, DependenciesIndex, Index};
 use LanguageServer\ContentRetriever\FileSystemContentRetriever;
 use LanguageServer\Protocol\{Position, Location, Range, ClientCapabilities};
+use LanguageServer\FilesFinder\FileSystemFilesFinder;
+use LanguageServer\Cache\FileSystemCache;
 use function LanguageServer\pathToUri;
 use Sabre\Event\Promise;
 
@@ -29,6 +31,10 @@ abstract class ServerTestCase extends TestCase
      */
     protected $documentLoader;
 
+    protected $projectIndex;
+    protected $input;
+    protected $output;
+
     /**
      * Map from FQN to Location of definition
      *
@@ -47,14 +53,22 @@ abstract class ServerTestCase extends TestCase
     {
         $sourceIndex       = new Index;
         $dependenciesIndex = new DependenciesIndex;
-        $projectIndex      = new ProjectIndex($sourceIndex, $dependenciesIndex);
-        $projectIndex->setComplete();
+        $this->projectIndex      = new ProjectIndex($sourceIndex, $dependenciesIndex);
+        $this->projectIndex->setComplete();
 
-        $definitionResolver   = new DefinitionResolver($projectIndex);
-        $client               = new LanguageClient(new MockProtocolStream, new MockProtocolStream);
-        $this->documentLoader = new PhpDocumentLoader(new FileSystemContentRetriever, $projectIndex, $definitionResolver);
-        $this->textDocument   = new Server\TextDocument($this->documentLoader, $definitionResolver, $client, $projectIndex);
-        $this->workspace      = new Server\Workspace($projectIndex, $dependenciesIndex, $sourceIndex, null, $this->documentLoader);
+        $rootPath    = realpath(__DIR__ . '/../../fixtures/');
+        $options     = new Options;
+        $filesFinder = new FileSystemFilesFinder;
+        $cache       = new FileSystemCache;
+
+        $this->input = new MockProtocolStream;
+        $this->output = new MockProtocolStream;
+        $definitionResolver   = new DefinitionResolver($this->projectIndex);
+        $client               = new LanguageClient($this->input, $this->output);
+        $this->documentLoader = new PhpDocumentLoader(new FileSystemContentRetriever, $this->projectIndex, $definitionResolver);
+        $this->textDocument   = new Server\TextDocument($this->documentLoader, $definitionResolver, $client, $this->projectIndex);
+        $indexer              = new Indexer($filesFinder, $rootPath, $client, $cache, $dependenciesIndex, $sourceIndex, $this->documentLoader, null, null, $options);
+        $this->workspace      = new Server\Workspace($this->projectIndex, $dependenciesIndex, $sourceIndex, null, $this->documentLoader, null, $indexer, $options);
 
         $globalSymbolsUri    = pathToUri(realpath(__DIR__ . '/../../fixtures/global_symbols.php'));
         $globalReferencesUri = pathToUri(realpath(__DIR__ . '/../../fixtures/global_references.php'));
diff --git a/tests/Server/Workspace/DidChangeConfigurationTest.php b/tests/Server/Workspace/DidChangeConfigurationTest.php
new file mode 100644
index 0000000..18970e9
--- /dev/null
+++ b/tests/Server/Workspace/DidChangeConfigurationTest.php
@@ -0,0 +1,72 @@
+<?php
+declare(strict_types = 1);
+
+namespace LanguageServer\Tests\Server\Workspace;
+
+use LanguageServer\Tests\MockProtocolStream;
+use LanguageServer\Tests\Server\ServerTestCase;
+use LanguageServer\{Server, Client, LanguageClient, Project, PhpDocument, Options};
+use LanguageServer\Protocol\{
+    Message,
+    MessageType,
+    TextDocumentItem,
+    TextDocumentIdentifier,
+    SymbolInformation,
+    SymbolKind,
+    DiagnosticSeverity,
+    FormattingOptions,
+    Location,
+    Range,
+    Position
+};
+use AdvancedJsonRpc\{Request as RequestBody, Response as ResponseBody};
+use function LanguageServer\pathToUri;
+use Sabre\Event\Promise;
+use Exception;
+
+class DidChangeConfigurationTest extends ServerTestCase
+{
+    public function testWipingIndex()
+    {
+        $promise = new Promise;
+
+        $this->projectIndex->on('wipe', function() use ($promise) {
+            $promise->fulfill();
+        });
+
+        $options = new Options;
+        $options->fileTypes = [
+            '.inc'
+        ];
+
+        $this->workspace->didChangeConfiguration($options);
+        $promise->wait();
+    }
+
+    public function testReindexingAfterWipe()
+    {
+        $promise = new Promise;
+
+        $this->output->on('message', function (Message $msg) use ($promise) {
+            if ($msg->body->method === 'window/logMessage' && $promise->state === Promise::PENDING) {
+                if ($msg->body->params->type === MessageType::ERROR) {
+                    $promise->reject(new Exception($msg->body->params->message));
+                } elseif (strpos($msg->body->params->message, 'All 0 PHP files parsed') !== false) {
+                    $promise->fulfill();
+                }
+            }
+        });
+
+        $options = new Options;
+        $options->fileTypes = [
+            '.inc'
+        ];
+
+        $this->workspace->didChangeConfiguration($options);
+        $promise->wait();
+    }
+
+    public function testGetChangedOptions()
+    {
+    }
+}