diff --git a/SentryTestUtils/TestSentryNSTimerWrapper.swift b/SentryTestUtils/TestSentryNSTimerWrapper.swift
index 34b10dfb8cb..5def3be65f8 100644
--- a/SentryTestUtils/TestSentryNSTimerWrapper.swift
+++ b/SentryTestUtils/TestSentryNSTimerWrapper.swift
@@ -16,7 +16,7 @@ public class TestSentryNSTimerWrapper: SentryNSTimerWrapper {
         var block: ((Timer) -> Void)?
     }
 
-    public lazy var overrides = Overrides()
+    public var overrides = Overrides()
 
     public override func scheduledTimer(withTimeInterval interval: TimeInterval, repeats: Bool, block: @escaping (Timer) -> Void) -> Timer {
         let timer = TestTimer()
diff --git a/Tests/SentryTests/Integrations/Performance/Network/SentryNetworkTrackerTests.swift b/Tests/SentryTests/Integrations/Performance/Network/SentryNetworkTrackerTests.swift
index 7641face2c3..d567a7a42e1 100644
--- a/Tests/SentryTests/Integrations/Performance/Network/SentryNetworkTrackerTests.swift
+++ b/Tests/SentryTests/Integrations/Performance/Network/SentryNetworkTrackerTests.swift
@@ -625,8 +625,6 @@ class SentryNetworkTrackerTests: XCTestCase {
         
         sut.urlSessionTask(task, setState: .completed)
         
-        fixture.hub.group.wait()
-        
         guard let envelope = self.fixture.hub.capturedEventsWithScopes.first else {
             XCTFail("Expected to capture 1 event")
             return
@@ -656,8 +654,6 @@ class SentryNetworkTrackerTests: XCTestCase {
         
         sut.urlSessionTask(task, setState: .completed)
         
-        fixture.hub.group.wait()
-        
         guard let envelope = self.fixture.hub.capturedEventsWithScopes.first else {
             XCTFail("Expected to capture 1 event")
             return
@@ -677,8 +673,6 @@ class SentryNetworkTrackerTests: XCTestCase {
         
         sut.urlSessionTask(task, setState: .completed)
         
-        fixture.hub.group.wait()
-        
         guard let envelope = self.fixture.hub.capturedEventsWithScopes.first else {
             XCTFail("Expected to capture 1 event")
             return
diff --git a/Tests/SentryTests/State/TestHub.swift b/Tests/SentryTests/State/TestHub.swift
index a4bc4ea5695..c66c452063f 100644
--- a/Tests/SentryTests/State/TestHub.swift
+++ b/Tests/SentryTests/State/TestHub.swift
@@ -1,9 +1,7 @@
 import Foundation
+import SentryTestUtils
 
 class TestHub: SentryHub {
-    
-    let group = DispatchGroup()
-    let queue = DispatchQueue(label: "TestHub", attributes: .concurrent)
 
     var startSessionInvocations: Int = 0
     var closeCachedSessionInvocations: Int = 0
@@ -23,30 +21,27 @@ class TestHub: SentryHub {
         endSessionTimestamp = timestamp
     }
     
-    var sentCrashEvents: [Event] = []
+    var sentCrashEvents = Invocations<Event>()
     override func captureCrash(_ event: Event) {
-        sentCrashEvents.append(event)
+        sentCrashEvents.record(event)
     }
     
-    var sentCrashEventsWithScope: [(event: Event, scope: Scope)] = []
+    var sentCrashEventsWithScope = Invocations<(event: Event, scope: Scope)>()
     override func captureCrash(_ event: Event, with scope: Scope) {
-        sentCrashEventsWithScope.append((event, scope))
+        sentCrashEventsWithScope.record((event, scope))
     }
     
-    var capturedEventsWithScopes: [(event: Event, scope: Scope, additionalEnvelopeItems: [SentryEnvelopeItem])] = []
+    var capturedEventsWithScopes = Invocations<(event: Event, scope: Scope, additionalEnvelopeItems: [SentryEnvelopeItem])>()
     override func capture(event: Event, scope: Scope, additionalEnvelopeItems: [SentryEnvelopeItem]) -> SentryId {
-        group.enter()
-        queue.async(flags: .barrier) {
-            self.capturedEventsWithScopes.append((event, scope, additionalEnvelopeItems))
-            self.group.leave()
-        }
+        
+        self.capturedEventsWithScopes.record((event, scope, additionalEnvelopeItems))
         
         return event.eventId
     }
 
-    var capturedTransactionsWithScope: [(transaction: [String: Any], scope: Scope)] = []
+    var capturedTransactionsWithScope = Invocations<(transaction: [String: Any], scope: Scope)>()
     override func capture(_ transaction: Transaction, with scope: Scope) -> SentryId {
-        capturedTransactionsWithScope.append((transaction.serialize(), scope))
+        capturedTransactionsWithScope.record((transaction.serialize(), scope))
         return super.capture(transaction, with: scope)
     }
 }
diff --git a/Tests/SentryTests/Transaction/SentryTracerTests.swift b/Tests/SentryTests/Transaction/SentryTracerTests.swift
index 6fd41429f49..f27f3da33b3 100644
--- a/Tests/SentryTests/Transaction/SentryTracerTests.swift
+++ b/Tests/SentryTests/Transaction/SentryTracerTests.swift
@@ -603,7 +603,6 @@ class SentryTracerTests: XCTestCase {
         let sut = fixture.getSut()
         advanceTime(bySeconds: 1)
         sut.finish()
-        fixture.hub.group.wait()
         
         XCTAssertEqual(1, fixture.hub.capturedEventsWithScopes.count)
 
@@ -623,16 +622,14 @@ class SentryTracerTests: XCTestCase {
         advanceTime(bySeconds: 0.5)
         secondTransaction.finish()
 
-        fixture.hub.group.wait()
         XCTAssertEqual(1, fixture.hub.capturedEventsWithScopes.count)
         let serializedSecondTransaction = fixture.hub.capturedEventsWithScopes.first!.event.serialize()
         XCTAssertNil(serializedSecondTransaction["measurements"])
 
         firstTransaction.finish()
-        fixture.hub.group.wait()
         
         XCTAssertEqual(2, fixture.hub.capturedEventsWithScopes.count)
-        assertAppStartMeasurementOn(transaction: fixture.hub.capturedEventsWithScopes[1].event as! Transaction, appStartMeasurement: appStartMeasurement)
+        assertAppStartMeasurementOn(transaction: fixture.hub.capturedEventsWithScopes.invocations[1].event as! Transaction, appStartMeasurement: appStartMeasurement)
     }
     
     func testAddUnknownAppStartMeasurement_NotPutOnNextTransaction() {
@@ -647,7 +644,6 @@ class SentryTracerTests: XCTestCase {
         ))
         
         fixture.getSut().finish()
-        fixture.hub.group.wait()
         
         assertAppStartMeasurementNotPutOnTransaction()
     }
@@ -694,7 +690,6 @@ class SentryTracerTests: XCTestCase {
         
         let sut = fixture.hub.startTransaction(transactionContext: TransactionContext(name: "custom", operation: "custom")) as! SentryTracer
         sut.finish()
-        fixture.hub.group.wait()
         
         XCTAssertNotNil(SentrySDK.getAppStartMeasurement())
         
@@ -718,7 +713,6 @@ class SentryTracerTests: XCTestCase {
         let sut = fixture.getSut()
         advanceTime(bySeconds: 1.0)
         sut.finish()
-        fixture.hub.group.wait()
         
         assertAppStartMeasurementNotPutOnTransaction()
     }
@@ -732,7 +726,6 @@ class SentryTracerTests: XCTestCase {
         let sut = fixture.getSut()
         advanceTime(bySeconds: 1.0)
         sut.finish()
-        fixture.hub.group.wait()
         
         assertAppStartMeasurementNotPutOnTransaction()
     }
@@ -744,7 +737,6 @@ class SentryTracerTests: XCTestCase {
         
         let sut = fixture.getSut()
         sut.finish()
-        fixture.hub.group.wait()
         
         assertAppStartMeasurementNotPutOnTransaction()
     }
@@ -760,7 +752,6 @@ class SentryTracerTests: XCTestCase {
         childSpan.setMeasurement(name: name, value: value, unit: unit)
         childSpan.finish()
         sut.finish()
-        fixture.hub.group.wait()
 
         XCTAssertEqual(1, fixture.hub.capturedEventsWithScopes.count)
         let serializedTransaction = fixture.hub.capturedEventsWithScopes.first?.event.serialize()
@@ -893,11 +884,9 @@ class SentryTracerTests: XCTestCase {
         queue.activate()
         group.wait()
         
-        fixture.hub.group.wait()
-        
         XCTAssertEqual(transactions, fixture.hub.capturedEventsWithScopes.count)
         
-        let transactionsWithAppStartMeasurement = fixture.hub.capturedEventsWithScopes.filter { pair in
+        let transactionsWithAppStartMeasurement = fixture.hub.capturedEventsWithScopes.invocations.filter { pair in
             let serializedTransaction = pair.event.serialize()
             let measurements = serializedTransaction["measurements"] as? [String: [String: Int]]
             return measurements == ["app_start_warm": ["value": 500]]
@@ -970,8 +959,6 @@ class SentryTracerTests: XCTestCase {
         
         sut.finish()
         
-        fixture.hub.group.wait()
-        
         XCTAssertEqual(1, fixture.hub.capturedEventsWithScopes.count)
         let serializedTransaction = fixture.hub.capturedEventsWithScopes.first!.event.serialize()
         let measurements = serializedTransaction["measurements"] as? [String: [String: Int]]
@@ -1023,16 +1010,13 @@ class SentryTracerTests: XCTestCase {
         let sut = fixture.getSut()
         sut.updateStartTime(fixture.appStartEnd.addingTimeInterval(startTimestamp))
         sut.finish()
-        fixture.hub.group.wait()
     }
 
     private func assertTransactionNotCaptured(_ tracer: SentryTracer) {
-        fixture.hub.group.wait()
         XCTAssertEqual(0, fixture.hub.capturedEventsWithScopes.count)
     }
     
     private func assertOneTransactionCaptured(_ tracer: SentryTracer) {
-        fixture.hub.group.wait()
         XCTAssertTrue(tracer.isFinished)
         XCTAssertEqual(1, fixture.hub.capturedEventsWithScopes.count)
     }
@@ -1115,8 +1099,6 @@ class SentryTracerTests: XCTestCase {
     }
     
     private func assertNoMeasurementsAdded() {
-        fixture.hub.group.wait()
-        
         XCTAssertEqual(1, fixture.hub.capturedEventsWithScopes.count)
         let serializedTransaction = fixture.hub.capturedEventsWithScopes.first?.event.serialize()
         XCTAssertNil(serializedTransaction?["measurements"])