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diff --git a/Firestore/Example/Tests/Integration/API/FIRServerTimestampTests.m b/Firestore/Example/Tests/Integration/API/FIRServerTimestampTests.m
new file mode 100644
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+++ b/Firestore/Example/Tests/Integration/API/FIRServerTimestampTests.m
@@ -0,0 +1,183 @@
+/*
+ * 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;
+
+#import <XCTest/XCTest.h>
+
+#import "Core/FSTFirestoreClient.h"
+
+#import "FSTEventAccumulator.h"
+#import "FSTIntegrationTestCase.h"
+
+@interface FIRServerTimestampTests : FSTIntegrationTestCase
+@end
+
+@implementation FIRServerTimestampTests {
+  // Data written in tests via set.
+  NSDictionary *_setData;
+
+  // Base and update data used for update tests.
+  NSDictionary *_initialData;
+  NSDictionary *_updateData;
+
+  // A document reference to read and write to.
+  FIRDocumentReference *_docRef;
+
+  // Accumulator used to capture events during the test.
+  FSTEventAccumulator *_accumulator;
+
+  // Listener registration for a listener maintained during the course of the test.
+  id<FIRListenerRegistration> _listenerRegistration;
+}
+
+- (void)setUp {
+  [super setUp];
+
+  // Data written in tests via set.
+  _setData = @{
+    @"a" : @42,
+    @"when" : [FIRFieldValue fieldValueForServerTimestamp],
+    @"deep" : @{@"when" : [FIRFieldValue fieldValueForServerTimestamp]}
+  };
+
+  // Base and update data used for update tests.
+  _initialData = @{ @"a" : @42 };
+  _updateData = @{
+    @"when" : [FIRFieldValue fieldValueForServerTimestamp],
+    @"deep" : @{@"when" : [FIRFieldValue fieldValueForServerTimestamp]}
+  };
+
+  _docRef = [self documentRef];
+  _accumulator = [FSTEventAccumulator accumulatorForTest:self];
+  _listenerRegistration = [_docRef addSnapshotListener:_accumulator.handler];
+
+  // Wait for initial nil snapshot to avoid potential races.
+  FIRDocumentSnapshot *initialSnapshot = [_accumulator awaitEventWithName:@"initial event"];
+  XCTAssertFalse(initialSnapshot.exists);
+}
+
+- (void)tearDown {
+  [_listenerRegistration remove];
+
+  [super tearDown];
+}
+
+// Returns the expected data, with an arbitrary timestamp substituted in.
+- (NSDictionary *)expectedDataWithTimestamp:(id _Nullable)timestamp {
+  return @{ @"a" : @42, @"when" : timestamp, @"deep" : @{@"when" : timestamp} };
+}
+
+/** Writes _initialData and waits for the corresponding snapshot. */
+- (void)writeInitialData {
+  [self writeDocumentRef:_docRef data:_initialData];
+  FIRDocumentSnapshot *initialDataSnap = [_accumulator awaitEventWithName:@"Initial data event."];
+  XCTAssertEqualObjects(initialDataSnap.data, _initialData);
+}
+
+/** Waits for a snapshot containing _setData but with NSNull for the timestamps. */
+- (void)waitForLocalEvent {
+  FIRDocumentSnapshot *localSnap = [_accumulator awaitEventWithName:@"Local event."];
+  XCTAssertEqualObjects(localSnap.data, [self expectedDataWithTimestamp:[NSNull null]]);
+}
+
+/** Waits for a snapshot containing _setData but with resolved server timestamps. */
+- (void)waitForRemoteEvent {
+  // server event should have a resolved timestamp; verify it.
+  FIRDocumentSnapshot *remoteSnap = [_accumulator awaitEventWithName:@"Remote event"];
+  XCTAssertTrue(remoteSnap.exists);
+  NSDate *when = remoteSnap[@"when"];
+  XCTAssertTrue([when isKindOfClass:[NSDate class]]);
+  // Tolerate up to 10 seconds of clock skew between client and server.
+  XCTAssertEqualWithAccuracy(when.timeIntervalSinceNow, 0, 10);
+
+  // Validate the rest of the document.
+  XCTAssertEqualObjects(remoteSnap.data, [self expectedDataWithTimestamp:when]);
+}
+
+- (void)runTransactionBlock:(void (^)(FIRTransaction *transaction))transactionBlock {
+  XCTestExpectation *expectation = [self expectationWithDescription:@"transaction complete"];
+  [_docRef.firestore runTransactionWithBlock:^id(FIRTransaction *transaction, NSError **pError) {
+    transactionBlock(transaction);
+    return nil;
+  }
+      completion:^(id result, NSError *error) {
+        XCTAssertNil(error);
+        [expectation fulfill];
+      }];
+  [self awaitExpectations];
+}
+
+- (void)testServerTimestampsWorkViaSet {
+  [self writeDocumentRef:_docRef data:_setData];
+  [self waitForLocalEvent];
+  [self waitForRemoteEvent];
+}
+
+- (void)testServerTimestampsWorkViaUpdate {
+  [self writeInitialData];
+  [self updateDocumentRef:_docRef data:_updateData];
+  [self waitForLocalEvent];
+  [self waitForRemoteEvent];
+}
+
+- (void)testServerTimestampsWorkViaTransactionSet {
+  [self runTransactionBlock:^(FIRTransaction *transaction) {
+    [transaction setData:_setData forDocument:_docRef];
+  }];
+
+  [self waitForRemoteEvent];
+}
+
+- (void)testServerTimestampsWorkViaTransactionUpdate {
+  [self writeInitialData];
+  [self runTransactionBlock:^(FIRTransaction *transaction) {
+    [transaction updateData:_updateData forDocument:_docRef];
+  }];
+  [self waitForRemoteEvent];
+}
+
+- (void)testServerTimestampsFailViaUpdateOnNonexistentDocument {
+  XCTestExpectation *expectation = [self expectationWithDescription:@"update complete"];
+  [_docRef updateData:_updateData
+           completion:^(NSError *error) {
+             XCTAssertNotNil(error);
+             XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
+             XCTAssertEqual(error.code, FIRFirestoreErrorCodeNotFound);
+             [expectation fulfill];
+           }];
+  [self awaitExpectations];
+}
+
+- (void)testServerTimestampsFailViaTransactionUpdateOnNonexistentDocument {
+  XCTestExpectation *expectation = [self expectationWithDescription:@"transaction complete"];
+  [_docRef.firestore runTransactionWithBlock:^id(FIRTransaction *transaction, NSError **pError) {
+    [transaction updateData:_updateData forDocument:_docRef];
+    return nil;
+  }
+      completion:^(id result, NSError *error) {
+        XCTAssertNotNil(error);
+        XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
+        // TODO(b/35201829): This should be NotFound, but right now we retry transactions on any
+        // error and so this turns into Aborted instead.
+        // TODO(mikelehen): Actually it's FailedPrecondition, unlike Android. What do we want???
+        XCTAssertEqual(error.code, FIRFirestoreErrorCodeFailedPrecondition);
+        [expectation fulfill];
+      }];
+  [self awaitExpectations];
+}
+
+@end