diff --git a/Source/BugsnagConfiguration.h b/Source/BugsnagConfiguration.h
index dae31ff7c..86388335f 100644
--- a/Source/BugsnagConfiguration.h
+++ b/Source/BugsnagConfiguration.h
@@ -145,6 +145,12 @@ typedef NSDictionary *_Nullable (^BugsnagBeforeNotifyHook)(
  */
 - (void)addBeforeSendBlock:(BugsnagBeforeSendBlock _Nonnull)block;
 
+
+/**
+ * Clear all callbacks
+ */
+- (void)clearBeforeSendBlocks;
+
 /**
  *  Whether reports shoould be sent, based on release stage options
  *
diff --git a/Source/BugsnagConfiguration.m b/Source/BugsnagConfiguration.m
index bfae933e6..515e2eb62 100644
--- a/Source/BugsnagConfiguration.m
+++ b/Source/BugsnagConfiguration.m
@@ -38,7 +38,7 @@ + (BugsnagNotifier*)notifier;
 
 @interface BugsnagConfiguration ()
 @property(nonatomic, readwrite, strong) NSMutableArray *beforeNotifyHooks;
-@property(nonatomic, readwrite, strong) NSMutableArray *BugsnagBeforeSendBlock;
+@property(nonatomic, readwrite, strong) NSMutableArray *beforeSendBlocks;
 @end
 
 @implementation BugsnagConfiguration
@@ -51,7 +51,7 @@ - (id)init {
     _autoNotify = YES;
     _notifyURL = [NSURL URLWithString:@"https://notify.bugsnag.com/"];
     _beforeNotifyHooks = [NSMutableArray new];
-    _BugsnagBeforeSendBlock = [NSMutableArray new];
+    _beforeSendBlocks = [NSMutableArray new];
     _notifyReleaseStages = nil;
     _breadcrumbs = [BugsnagBreadcrumbs new];
     _automaticallyCollectBreadcrumbs = YES;
@@ -83,6 +83,10 @@ - (void)addBeforeSendBlock:(BugsnagBeforeSendBlock)block {
   [(NSMutableArray *)self.beforeSendBlocks addObject:[block copy]];
 }
 
+- (void)clearBeforeSendBlocks {
+  [(NSMutableArray *)self.beforeSendBlocks removeAllObjects];
+}
+
 - (void)addBeforeNotifyHook:(BugsnagBeforeNotifyHook)hook {
   [(NSMutableArray *)self.beforeNotifyHooks addObject:[hook copy]];
 }
diff --git a/Tests/BugsnagSpec.m b/Tests/BugsnagSpec.m
index 09bb3b1af..c567b813a 100644
--- a/Tests/BugsnagSpec.m
+++ b/Tests/BugsnagSpec.m
@@ -42,6 +42,7 @@ @implementation BugsnagTestError
     };
 
     beforeEach(^{
+        request = nil;
         BugsnagSink *sink = [[KSCrash sharedInstance] valueForKeyPath:@"sink"];
         NSURLSession *session = [sink valueForKeyPath:@"session"];
         [session stub:@selector(uploadTaskWithRequest:fromData:completionHandler:) withBlock:^id(NSArray *params) {
@@ -56,6 +57,7 @@ @implementation BugsnagTestError
     afterEach(^{
         request = nil;
         httpBody = nil;
+        [[Bugsnag configuration] clearBeforeSendBlocks];
     });
 
     describe(@"notify:", ^{
@@ -87,6 +89,46 @@ @implementation BugsnagTestError
         });
     });
 
+    describe(@"updating a report via notify: with beforeSend block", ^{
+        __block NSException *exception;
+        __block BOOL called;
+        beforeEach(^{
+            called = NO;
+            exception = [NSException exceptionWithName:@"failure to launch"
+                                                reason:@"no fuel" userInfo:nil];
+            [[Bugsnag configuration] addBeforeSendBlock:^bool(NSDictionary * _Nonnull rawEventData, BugsnagCrashReport * _Nonnull report) {
+                report.errorClass = @"FatalException";
+                called = YES;
+                return YES;
+            }];
+            [Bugsnag notify:exception];
+        });
+
+        it(@"invokes the block", ^{
+            [[expectFutureValue(@(called)) shouldSoon] equal:@YES];
+        });
+
+        it(@"updates report data", ^{
+             [[expectFutureValue(requestExceptionValue(@"errorClass")) shouldSoon] equal:@"FatalException"];
+        });
+    });
+
+    describe(@"cancelling a report via notify: with beforeSend block", ^{
+        __block NSException *exception;
+        beforeEach(^{
+            exception = [NSException exceptionWithName:@"failure to launch"
+                                                reason:@"no fuel" userInfo:nil];
+            [[Bugsnag configuration] addBeforeSendBlock:^bool(NSDictionary * _Nonnull rawEventData, BugsnagCrashReport * _Nonnull report) {
+                return NO;
+            }];
+            [Bugsnag notify:exception];
+        });
+
+        it(@"cancels the report", ^{
+            [[expectFutureValue(request) shouldAfterWait] beNil];
+        });
+    });
+
     describe(@"notify:block:", ^{
 
         __block NSException *exception;