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diff --git a/Firestore/Example/Tests/SpecTests/FSTMemorySpecTests.mm b/Firestore/Example/Tests/SpecTests/FSTMemorySpecTests.mm
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+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Firestore/Example/Tests/SpecTests/FSTSpecTests.h"
+
+#import "Firestore/Source/Local/FSTMemoryPersistence.h"
+
+#import "Firestore/Example/Tests/Local/FSTPersistenceTestHelpers.h"
+#import "Firestore/Example/Tests/SpecTests/FSTSyncEngineTestDriver.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * An implementation of FSTSpecTests that uses the memory-only implementation of local storage.
+ *
+ * @see the FSTSpecTests class comments for more information about how this works.
+ */
+@interface FSTMemorySpecTests : FSTSpecTests
+@end
+
+@implementation FSTMemorySpecTests
+
+/** Overrides -[FSTSpecTests persistence] */
+- (id<FSTPersistence>)persistence {
+  return [FSTPersistenceTestHelpers memoryPersistence];
+}
+@end
+
+NS_ASSUME_NONNULL_END