Code to pass the test.

NTDCoreDataTableViewControllerTests/NTDCoreDataTableViewControllerTests.m

@@ -64,8 +64,9 @@
     // given
     sut = [[NTDFakeCDTVC alloc] init];
     sut.fetchedResultsController = [[NTDFakeFetchedResultsController alloc] init];
+
+    [(NTDFakeFetchedResultsController *)sut.fetchedResultsController setFetchWillSucceed:NO];
     // when
-    [(NTDFakeCDTVC *)sut setFetchWillFail:NO];
     [sut performFetch];
     // then
     XCTAssertTrue([(NTDFakeCDTVC *)sut loggedFailure]);

NTDCoreDataTableViewControllerTests/NTDFakeCDTVC.h

@@ -10,7 +10,6 @@
 
 @interface NTDFakeCDTVC : NTDCoreDataTableViewController
 
-@property (nonatomic) BOOL fetchWillFail;
 @property (nonatomic) BOOL loggedFailure;
 
 @end

NTDCoreDataTableViewControllerTests/NTDFakeFetchedResultsController.h

@@ -10,6 +10,7 @@
 
 @interface NTDFakeFetchedResultsController : NSFetchedResultsController
 
+@property (nonatomic) BOOL fetchWillSucceed;
 @property (nonatomic) BOOL performFetchIsCalled;
 
 @end

NTDCoreDataTableViewControllerTests/NTDFakeFetchedResultsController.m

@@ -8,12 +8,27 @@
 
 #import "NTDFakeFetchedResultsController.h"
 
+@interface NTDFakeFetchedResultsController ()
+@property (nonatomic) BOOL fakePerformFetchsReturnValue;
+@end
+
 @implementation NTDFakeFetchedResultsController
 
 - (BOOL)performFetch:(NSError *__autoreleasing *)error
 {
     self.performFetchIsCalled = YES;
-    return [super performFetch:error];
+    
+    if (self.fakePerformFetchsReturnValue) {
+        return self.fetchWillSucceed;
+    } else {
+        return [super performFetch:error];
+    }
+}
+
+- (void)setFetchWillSucceed:(BOOL)fetchWillSucceed
+{
+    _fetchWillSucceed = fetchWillSucceed;
+    self.fakePerformFetchsReturnValue = YES;
 }
 
 @end