diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9a483a..e35c299 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [0.2.1] - 2017-09-29
+### Added
+- additional unit tests for checking caching of lazy-loaded relationships.
+
+### Fixed
+- generation of cache key for queries with where clauses.
+
 ## [0.2.0] - 2017-09-24
 ### Changed
 - approach to caching things. Completely rewrote the CachedBuilder class.
diff --git a/src/CachedBuilder.php b/src/CachedBuilder.php
index 9f53bf0..7166e50 100644
--- a/src/CachedBuilder.php
+++ b/src/CachedBuilder.php
@@ -76,7 +76,7 @@ protected function getWhereClauses() : string
             $value = $where['value'] ?? implode('_', ($where['values'] ?? []));
 
             if (! $value) {
-                return '';
+                return $carry . '';
             }
 
             return "{$carry}-{$where['column']}_{$value}";
diff --git a/tests/Fixtures/Http/Resources/Author.php b/tests/Fixtures/Http/Resources/Author.php
new file mode 100644
index 0000000..c598f77
--- /dev/null
+++ b/tests/Fixtures/Http/Resources/Author.php
@@ -0,0 +1,14 @@
+<?php namespace GeneaLabs\LaravelModelCaching\Tests\Fixtures\Http\Resources;
+
+use Illuminate\Http\Resources\Json\Resource;
+
+class Author extends Resource
+{
+    public function toArray($request)
+    {
+        return [
+            'name' => $this->name,
+            'books' => $this->books,
+        ];
+    }
+}
diff --git a/tests/Unit/CachedBuilderTest.php b/tests/Unit/CachedBuilderTest.php
index 8f8552f..d8e104b 100644
--- a/tests/Unit/CachedBuilderTest.php
+++ b/tests/Unit/CachedBuilderTest.php
@@ -10,6 +10,7 @@
 use GeneaLabs\LaravelModelCaching\Tests\Fixtures\UncachedProfile;
 use GeneaLabs\LaravelModelCaching\Tests\Fixtures\UncachedPublisher;
 use GeneaLabs\LaravelModelCaching\Tests\Fixtures\UncachedStore;
+use GeneaLabs\LaravelModelCaching\Tests\Fixtures\Http\Resources\Author as AuthorResource;
 use GeneaLabs\LaravelModelCaching\Tests\TestCase;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 
@@ -53,7 +54,7 @@ public function testCacheIsEmptyBeforeLoadingModels()
                 'genealabslaravelmodelcachingtestsfixturesauthor',
                 'genealabslaravelmodelcachingtestsfixturesbook'
             ])
-            ->get('genealabslaravelmodelcachingtestsfixturesauthor_1_2_3_4_5_6_7_8_9_10-genealabslaravelmodelcachingtestsfixturesbooks');
+            ->get('genealabslaravelmodelcachingtestsfixturesauthor-books');
 
         $this->assertNull($results);
     }
@@ -438,4 +439,34 @@ public function testNestedRelationshipEagerloading()
         $this->assertEmpty($authors->diffAssoc($cachedResults));
         $this->assertEmpty($liveResults->diffAssoc($cachedResults));
     }
+
+    public function testLazyLoadedRelationshipResolvesThroughCachedBuilder()
+    {
+        $books = (new Author)->first()->books;
+        $key = 'genealabslaravelmodelcachingtestsfixturesbook-books.author_id_1';
+        $tags = [
+            'genealabslaravelmodelcachingtestsfixturesbook',
+        ];
+
+        $cachedResults = cache()->tags($tags)->get($key);
+        $liveResults = (new UncachedAuthor)->first()->books;
+
+        $this->assertEmpty($books->diffAssoc($cachedResults));
+        $this->assertEmpty($liveResults->diffAssoc($cachedResults));
+    }
+
+    public function testLazyLoadingOnResourceIsCached()
+    {
+        $books = (new AuthorResource((new Author)->first()))->books;
+        $key = 'genealabslaravelmodelcachingtestsfixturesbook-books.author_id_1';
+        $tags = [
+            'genealabslaravelmodelcachingtestsfixturesbook',
+        ];
+
+        $cachedResults = cache()->tags($tags)->get($key);
+        $liveResults = (new UncachedAuthor)->first()->books;
+
+        $this->assertEmpty($books->diffAssoc($cachedResults));
+        $this->assertEmpty($liveResults->diffAssoc($cachedResults));
+    }
 }