diff --git a/SentryTestUtils/ClearTestState.swift b/SentryTestUtils/ClearTestState.swift
index 9294fd41c25..db673e717a6 100644
--- a/SentryTestUtils/ClearTestState.swift
+++ b/SentryTestUtils/ClearTestState.swift
@@ -1,5 +1,5 @@
 import Foundation
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 
 public func clearTestState() {
     TestCleanup.clearTestState()
diff --git a/SentryTestUtils/SentryLogExtensions.swift b/SentryTestUtils/SentryLogExtensions.swift
index 0ccc580d05e..826bdc23099 100644
--- a/SentryTestUtils/SentryLogExtensions.swift
+++ b/SentryTestUtils/SentryLogExtensions.swift
@@ -1,5 +1,5 @@
 import Foundation
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 
 extension SentryLog {
     public static func setTestDefaultLogLevel() {
diff --git a/SentryTestUtils/TestHub.swift b/SentryTestUtils/TestHub.swift
index 9b6a0988aa7..fd6b53c5c97 100644
--- a/SentryTestUtils/TestHub.swift
+++ b/SentryTestUtils/TestHub.swift
@@ -1,6 +1,6 @@
 import _SentryPrivate
 import Foundation
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 
 public class TestHub: SentryHub {
 
@@ -51,8 +51,8 @@ public class TestHub: SentryHub {
     }
     
     public var onReplayCapture: (() -> Void)?
-    public var capturedReplayRecordingVideo = Invocations<(replay: SentryReplayEvent, recording: SentryReplayRecording, video: URL)>()
-    public override func capture(_ replayEvent: SentryReplayEvent, replayRecording: SentryReplayRecording, video videoURL: URL) {
+    @_spi(Private) public var capturedReplayRecordingVideo = Invocations<(replay: SentryReplayEvent, recording: SentryReplayRecording, video: URL)>()
+    @_spi(Private) public override func capture(_ replayEvent: SentryReplayEvent, replayRecording: SentryReplayRecording, video videoURL: URL) {
         capturedReplayRecordingVideo.record((replayEvent, replayRecording, videoURL))
         onReplayCapture?()
     }
diff --git a/Sources/Swift/Core/Helper/Log/SentryLevel.swift b/Sources/Swift/Core/Helper/Log/SentryLevel.swift
index 50f512b9f26..2a0f3fe01c4 100644
--- a/Sources/Swift/Core/Helper/Log/SentryLevel.swift
+++ b/Sources/Swift/Core/Helper/Log/SentryLevel.swift
@@ -36,12 +36,12 @@ extension SentryLevel: CustomStringConvertible {
 }
 
 @objcMembers
-class SentryLevelHelper: NSObject {
-    static func nameForLevel(_  level: SentryLevel) -> String {
+@_spi(Private) public class SentryLevelHelper: NSObject {
+    public static func nameForLevel(_  level: SentryLevel) -> String {
         return level.description
     }
     
-    static func levelForName(_ name: String) -> SentryLevel {
+    public static func levelForName(_ name: String) -> SentryLevel {
         .fromName(name)
     }
 }
diff --git a/Sources/Swift/Core/Helper/SentryCurrentDateProvider.swift b/Sources/Swift/Core/Helper/SentryCurrentDateProvider.swift
index a25e9043e2c..851df07fe9e 100644
--- a/Sources/Swift/Core/Helper/SentryCurrentDateProvider.swift
+++ b/Sources/Swift/Core/Helper/SentryCurrentDateProvider.swift
@@ -13,12 +13,12 @@ protocol SentryCurrentDateProvider {
 }
 
 @objcMembers
-class SentryDefaultCurrentDateProvider: NSObject, SentryCurrentDateProvider {
-    func date() -> Date {
+@_spi(Private) public class SentryDefaultCurrentDateProvider: NSObject, SentryCurrentDateProvider {
+    public func date() -> Date {
         return Date()
     }
     
-    func timezoneOffset() -> Int {
+    public func timezoneOffset() -> Int {
         return TimeZone.current.secondsFromGMT()
     }
     
@@ -26,7 +26,7 @@ class SentryDefaultCurrentDateProvider: NSObject, SentryCurrentDateProvider {
      * Returns the absolute timestamp, which has no defined reference point or unit
      * as it is platform dependent.
      */
-    func systemTime() -> UInt64 {
+    public func systemTime() -> UInt64 {
         Self.getAbsoluteTime()
     }
     
@@ -34,7 +34,7 @@ class SentryDefaultCurrentDateProvider: NSObject, SentryCurrentDateProvider {
         ProcessInfo.processInfo.systemUptime
     }
 
-    static func getAbsoluteTime() -> UInt64 {
+    public static func getAbsoluteTime() -> UInt64 {
         clock_gettime_nsec_np(CLOCK_UPTIME_RAW)
     }
 }
diff --git a/Sources/Swift/Core/Helper/SentryFileContents.swift b/Sources/Swift/Core/Helper/SentryFileContents.swift
index 9778b4f5d1d..e367ca5ebdc 100644
--- a/Sources/Swift/Core/Helper/SentryFileContents.swift
+++ b/Sources/Swift/Core/Helper/SentryFileContents.swift
@@ -1,12 +1,12 @@
 import Foundation
 
 @objcMembers
-class SentryFileContents: NSObject {
+@_spi(Private) public class SentryFileContents: NSObject {
     
-    let path: String
-    let contents: Data
+    public let path: String
+    public let contents: Data
     
-    init(path: String, contents: Data) {
+    public init(path: String, contents: Data) {
         self.path = path
         self.contents = contents
     }
diff --git a/Sources/Swift/Core/MetricKit/SentryMXCallStackTree.swift b/Sources/Swift/Core/MetricKit/SentryMXCallStackTree.swift
index 850d4f718fb..df1d8ed50c4 100644
--- a/Sources/Swift/Core/MetricKit/SentryMXCallStackTree.swift
+++ b/Sources/Swift/Core/MetricKit/SentryMXCallStackTree.swift
@@ -5,10 +5,10 @@ import Foundation
  * JSON specification of MXCallStackTree can be found here https://developer.apple.com/documentation/metrickit/mxcallstacktree/3552293-jsonrepresentation
  */
 @objcMembers
-class SentryMXCallStackTree: NSObject, Codable {
+@_spi(Private) public class SentryMXCallStackTree: NSObject, Codable {
     
-    let callStacks: [SentryMXCallStack]
-    let callStackPerThread: Bool
+    public let callStacks: [SentryMXCallStack]
+    public let callStackPerThread: Bool
     
     init(callStacks: [SentryMXCallStack], callStackPerThread: Bool) {
         self.callStacks = callStacks
@@ -21,11 +21,11 @@ class SentryMXCallStackTree: NSObject, Codable {
 }
 
 @objcMembers
-class SentryMXCallStack: NSObject, Codable {
-    var threadAttributed: Bool?
-    var callStackRootFrames: [SentryMXFrame]
+@_spi(Private) public class SentryMXCallStack: NSObject, Codable {
+    public var threadAttributed: Bool?
+    public var callStackRootFrames: [SentryMXFrame]
     
-    var flattenedRootFrames: [SentryMXFrame] {
+    public var flattenedRootFrames: [SentryMXFrame] {
         return callStackRootFrames.flatMap { [$0] + $0.frames }
     }
 
@@ -36,14 +36,14 @@ class SentryMXCallStack: NSObject, Codable {
 }
 
 @objcMembers
-class SentryMXFrame: NSObject, Codable {
-    var binaryUUID: UUID
-    var offsetIntoBinaryTextSegment: Int
-    var binaryName: String?
-    var address: UInt64
-    var subFrames: [SentryMXFrame]?
+@_spi(Private) public class SentryMXFrame: NSObject, Codable {
+    public var binaryUUID: UUID
+    public var offsetIntoBinaryTextSegment: Int
+    public var binaryName: String?
+    public var address: UInt64
+    public var subFrames: [SentryMXFrame]?
     
-    var sampleCount: Int?
+    public var sampleCount: Int?
     
     init(binaryUUID: UUID, offsetIntoBinaryTextSegment: Int, sampleCount: Int? = nil, binaryName: String? = nil, address: UInt64, subFrames: [SentryMXFrame]?) {
         self.binaryUUID = binaryUUID
diff --git a/Sources/Swift/Core/MetricKit/SentryMXManager.swift b/Sources/Swift/Core/MetricKit/SentryMXManager.swift
index 9bf449f0473..58cbb915d44 100644
--- a/Sources/Swift/Core/MetricKit/SentryMXManager.swift
+++ b/Sources/Swift/Core/MetricKit/SentryMXManager.swift
@@ -12,7 +12,7 @@ import MetricKit
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, *)
 @available(tvOS, unavailable)
 @available(watchOS, unavailable)
-@objc protocol SentryMXManagerDelegate {
+@objc @_spi(Private) public protocol SentryMXManagerDelegate {
     
     func didReceiveCrashDiagnostic(_ diagnostic: MXCrashDiagnostic, callStackTree: SentryMXCallStackTree, timeStampBegin: Date, timeStampEnd: Date)
     
@@ -26,7 +26,7 @@ import MetricKit
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, *)
 @available(tvOS, unavailable)
 @available(watchOS, unavailable)
-@objcMembers class SentryMXManager: NSObject, MXMetricManagerSubscriber {
+@objcMembers @_spi(Private) public class SentryMXManager: NSObject, MXMetricManagerSubscriber {
     
     let disableCrashDiagnostics: Bool
     
@@ -36,17 +36,17 @@ import MetricKit
 
     weak var delegate: SentryMXManagerDelegate?
     
-    func receiveReports() {
+    public func receiveReports() {
         let shared = MXMetricManager.shared
         shared.add(self)
     }
     
-    func pauseReports() {
+    public func pauseReports() {
         let shared = MXMetricManager.shared
         shared.remove(self)
     }
     
-    func didReceive(_ payloads: [MXDiagnosticPayload]) {
+    public func didReceive(_ payloads: [MXDiagnosticPayload]) {
         func actOn(callStackTree: MXCallStackTree, action: (SentryMXCallStackTree) -> Void) {
             guard let callStackTree = try? SentryMXCallStackTree.from(data: callStackTree.jsonRepresentation()) else {
                 return
diff --git a/Sources/Swift/Core/SwiftDescriptor.swift b/Sources/Swift/Core/SwiftDescriptor.swift
index 6d6e996857b..17f8af83399 100644
--- a/Sources/Swift/Core/SwiftDescriptor.swift
+++ b/Sources/Swift/Core/SwiftDescriptor.swift
@@ -5,17 +5,17 @@ import UIKit
 #endif
 
 @objc
-class SwiftDescriptor: NSObject {
+@_spi(Private) public class SwiftDescriptor: NSObject {
     
     @objc
-    static func getObjectClassName(_ object: AnyObject) -> String { 
+    public static func getObjectClassName(_ object: AnyObject) -> String {
         return String(describing: type(of: object))
     }
 
     /// UIViewControllers aren't available on watchOS
 #if canImport(UIKit) && !os(watchOS) && !SENTRY_NO_UIKIT
     @objc
-    static func getViewControllerClassName(_ object: UIViewController) -> String {
+    public static func getViewControllerClassName(_ object: UIViewController) -> String {
         if let object = object as? SentryUIViewControllerDescriptor {
             return object.sentryName
         }
@@ -24,7 +24,7 @@ class SwiftDescriptor: NSObject {
 #endif
 
     @objc
-    static func getSwiftErrorDescription(_ error: Error) -> String? {
+    public static func getSwiftErrorDescription(_ error: Error) -> String? {
         return String(describing: error)
     }
 }
diff --git a/Sources/Swift/Core/Tools/HTTPHeaderSanitizer.swift b/Sources/Swift/Core/Tools/HTTPHeaderSanitizer.swift
index b78a96b0dd3..5d9b99d959a 100644
--- a/Sources/Swift/Core/Tools/HTTPHeaderSanitizer.swift
+++ b/Sources/Swift/Core/Tools/HTTPHeaderSanitizer.swift
@@ -1,8 +1,8 @@
 import Foundation
 
 @objcMembers
-class HTTPHeaderSanitizer: NSObject {
-    static func sanitizeHeaders(_ headers: [String: String]) -> [String: String] {
+@_spi(Private) public class HTTPHeaderSanitizer: NSObject {
+    public static func sanitizeHeaders(_ headers: [String: String]) -> [String: String] {
         let _securityHeaders = Set([
             "X-FORWARDED-FOR", "AUTHORIZATION", "COOKIE", "SET-COOKIE", "X-API-KEY", "X-REAL-IP",
             "REMOTE-ADDR", "FORWARDED", "PROXY-AUTHORIZATION", "X-CSRF-TOKEN", "X-CSRFTOKEN",
diff --git a/Sources/Swift/Core/Tools/SentryLog.swift b/Sources/Swift/Core/Tools/SentryLog.swift
index b8833356b46..a251536e464 100644
--- a/Sources/Swift/Core/Tools/SentryLog.swift
+++ b/Sources/Swift/Core/Tools/SentryLog.swift
@@ -11,7 +11,7 @@ import Foundation
 /// and the thread sanitizer would surface these race conditions. We accept these race conditions for
 /// the log messages in the tests over adding locking for all log messages.
 @objc
-class SentryLog: NSObject {
+@_spi(Private) public class SentryLog: NSObject {
     
     static private(set) var isDebug = true
     static private(set) var diagnosticLevel = SentryLevel.error
@@ -29,7 +29,7 @@ class SentryLog: NSObject {
     }
     
     @objc
-    static func log(message: String, andLevel level: SentryLevel) {
+    public static func log(message: String, andLevel level: SentryLevel) {
         guard willLog(atLevel: level) else { return }
         
         // We use the timeIntervalSinceReferenceDate because date format is
@@ -45,7 +45,7 @@ class SentryLog: NSObject {
      * @c NO if not.
      */
     @objc
-    static func willLog(atLevel level: SentryLevel) -> Bool {
+    public static func willLog(atLevel level: SentryLevel) -> Bool {
         if level == .none {
             return false
         }
diff --git a/Sources/Swift/Core/Tools/URLSessionTaskHelper.swift b/Sources/Swift/Core/Tools/URLSessionTaskHelper.swift
index 6018e1df7b2..9217dae65e4 100644
--- a/Sources/Swift/Core/Tools/URLSessionTaskHelper.swift
+++ b/Sources/Swift/Core/Tools/URLSessionTaskHelper.swift
@@ -1,9 +1,9 @@
 import Foundation
 
 @objcMembers
-class URLSessionTaskHelper: NSObject {
+@_spi(Private) public class URLSessionTaskHelper: NSObject {
 
-    static func getGraphQLOperationName(from task: URLSessionTask?) -> String? {
+    public static func getGraphQLOperationName(from task: URLSessionTask?) -> String? {
         guard let task = task else { return nil }
         guard task.originalRequest?.value(forHTTPHeaderField: "Content-Type") == "application/json" else { return nil }
         guard let requestBody = task.originalRequest?.httpBody else { return nil }
diff --git a/Sources/Swift/Core/Tools/UrlSanitized.swift b/Sources/Swift/Core/Tools/UrlSanitized.swift
index 705ebe68b73..f821cbe91fa 100644
--- a/Sources/Swift/Core/Tools/UrlSanitized.swift
+++ b/Sources/Swift/Core/Tools/UrlSanitized.swift
@@ -1,15 +1,15 @@
 import Foundation
 
 @objcMembers
-class UrlSanitized: NSObject {
+@_spi(Private) public class UrlSanitized: NSObject {
     static let SENSITIVE_DATA_SUBSTITUTE = "[Filtered]"
     private var components: URLComponents?
 
-    var query: String? { components?.query }
-    var queryItems: [URLQueryItem]? { components?.queryItems }
-    var fragment: String? { components?.fragment }
+    public var query: String? { components?.query }
+    public var queryItems: [URLQueryItem]? { components?.queryItems }
+    public var fragment: String? { components?.fragment }
 
-    init(URL url: URL) {
+    public init(URL url: URL) {
         components = URLComponents(url: url, resolvingAgainstBaseURL: false)
 
         if components?.user != nil {
@@ -21,7 +21,7 @@ class UrlSanitized: NSObject {
         }
     }
 
-    var sanitizedUrl: String? {
+    public var sanitizedUrl: String? {
         guard var result = self.components?.string else { return nil }
         if let end = result.firstIndex(of: "?") ?? result.firstIndex(of: "#") {
             result = String(result[result.startIndex..<end])
diff --git a/Sources/Swift/Helper/SentryEnabledFeaturesBuilder.swift b/Sources/Swift/Helper/SentryEnabledFeaturesBuilder.swift
index 0181b0645f4..1b20f9e4812 100644
--- a/Sources/Swift/Helper/SentryEnabledFeaturesBuilder.swift
+++ b/Sources/Swift/Helper/SentryEnabledFeaturesBuilder.swift
@@ -1,9 +1,9 @@
 import Foundation
 
-@objcMembers class SentryEnabledFeaturesBuilder: NSObject {
+@objcMembers @_spi(Private) public class SentryEnabledFeaturesBuilder: NSObject {
 
     // swiftlint:disable cyclomatic_complexity function_body_length
-    static func getEnabledFeatures(options: Options?) -> [String] {
+    public static func getEnabledFeatures(options: Options?) -> [String] {
         guard let options = options else {
             return []
         }
diff --git a/Sources/Swift/Integrations/SessionReplay/SentryReplayEvent.swift b/Sources/Swift/Integrations/SessionReplay/SentryReplayEvent.swift
index 90b611078a5..61f2c99bdd3 100644
--- a/Sources/Swift/Integrations/SessionReplay/SentryReplayEvent.swift
+++ b/Sources/Swift/Integrations/SessionReplay/SentryReplayEvent.swift
@@ -2,27 +2,27 @@
 import Foundation
 
 @objcMembers
-class SentryReplayEvent: Event {
+@_spi(Private) public class SentryReplayEvent: Event {
     
     // Start time of the replay segment
-    let replayStartTimestamp: Date
+    public let replayStartTimestamp: Date
     
     // The Type of the replay
-    let replayType: SentryReplayType
+    public let replayType: SentryReplayType
     
     /**
      * Number of the segment in the replay.
      * This is an incremental number
      */
-    let segmentId: Int
+    public let segmentId: Int
  
     /**
      * This will be used to store the name of the screens
      * that appear during the duration of the replay segment.
      */
-    var urls: [String]?
-    
-    init(eventId: SentryId, replayStartTimestamp: Date, replayType: SentryReplayType, segmentId: Int) {
+    public var urls: [String]?
+
+    public init(eventId: SentryId, replayStartTimestamp: Date, replayType: SentryReplayType, segmentId: Int) {
         self.replayStartTimestamp = replayStartTimestamp
         self.replayType = replayType
         self.segmentId = segmentId
@@ -36,7 +36,7 @@ class SentryReplayEvent: Event {
         fatalError("init() has not been implemented")
     }
     
-    override func serialize() -> [String: Any] {
+    public override func serialize() -> [String: Any] {
         var result = super.serialize()
         result["urls"] = urls
         result["replay_start_timestamp"] = replayStartTimestamp.timeIntervalSince1970
diff --git a/Sources/Swift/Integrations/SessionReplay/SentryReplayRecording.swift b/Sources/Swift/Integrations/SessionReplay/SentryReplayRecording.swift
index 4ace4cb51c3..568e6a64b5f 100644
--- a/Sources/Swift/Integrations/SessionReplay/SentryReplayRecording.swift
+++ b/Sources/Swift/Integrations/SessionReplay/SentryReplayRecording.swift
@@ -1,7 +1,7 @@
 import Foundation
 
 @objcMembers
-class SentryReplayRecording: NSObject {
+@_spi(Private) public class SentryReplayRecording: NSObject {
     
     static let SentryReplayEncoding = "h264"
     static let SentryReplayContainer = "mp4"
diff --git a/Sources/Swift/Integrations/SessionReplay/SentryReplayType.swift b/Sources/Swift/Integrations/SessionReplay/SentryReplayType.swift
index a933d8220c7..ed20ec9a6de 100644
--- a/Sources/Swift/Integrations/SessionReplay/SentryReplayType.swift
+++ b/Sources/Swift/Integrations/SessionReplay/SentryReplayType.swift
@@ -1,7 +1,7 @@
 import Foundation
 
 @objc
-enum SentryReplayType: Int {
+@_spi(Private) public enum SentryReplayType: Int {
     case session
     case buffer
 }
@@ -18,7 +18,7 @@ extension SentryReplayType {
 // Implementing the CustomStringConvertible protocol to provide a string representation of the enum values.
 // This method will be called by the Swift runtime when converting the enum to a string, i.e. in String interpolations.
 extension SentryReplayType: CustomStringConvertible {
-    var description: String {
+    public var description: String {
         return toString()
     }
 }
diff --git a/Sources/Swift/Protocol/Codable/SentryEventDecoder.swift b/Sources/Swift/Protocol/Codable/SentryEventDecoder.swift
index 8797fc29993..231c9b962f0 100644
--- a/Sources/Swift/Protocol/Codable/SentryEventDecoder.swift
+++ b/Sources/Swift/Protocol/Codable/SentryEventDecoder.swift
@@ -2,7 +2,7 @@ import Foundation
 
 @objcMembers
 public class SentryEventDecoder: NSObject {
-    static func decodeEvent(jsonData: Data) -> Event? {
+    @_spi(Private) public static func decodeEvent(jsonData: Data) -> Event? {
         return decodeFromJSONData(jsonData: jsonData) as SentryEventDecodable?
     }
 }
diff --git a/Sources/Swift/Tools/SentryLog+Configure.swift b/Sources/Swift/Tools/SentryLog+Configure.swift
index 2b534eb8b6f..6289f6a14d5 100644
--- a/Sources/Swift/Tools/SentryLog+Configure.swift
+++ b/Sources/Swift/Tools/SentryLog+Configure.swift
@@ -5,7 +5,7 @@ import Foundation
 // The result would be the selector would be missing at runtime and objc code that calls the method would crash.
 // More details here: https://github.com/swiftlang/swift/issues/48561
 @objc
-class SentryLogSwiftSupport: NSObject {
+@_spi(Private) public class SentryLogSwiftSupport: NSObject {
 
   @objc
   public static func configure(_ isDebug: Bool, diagnosticLevel: SentryLevel) {
diff --git a/Tests/SentryProfilerTests/SentryContinuousProfilerTests.swift b/Tests/SentryProfilerTests/SentryContinuousProfilerTests.swift
index b58ce1cd2ff..e93a55dcf2d 100644
--- a/Tests/SentryProfilerTests/SentryContinuousProfilerTests.swift
+++ b/Tests/SentryProfilerTests/SentryContinuousProfilerTests.swift
@@ -1,5 +1,5 @@
 import _SentryPrivate
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryProfilerTests/SentryTraceProfilerTests.swift b/Tests/SentryProfilerTests/SentryTraceProfilerTests.swift
index 94208169104..c6858680011 100644
--- a/Tests/SentryProfilerTests/SentryTraceProfilerTests.swift
+++ b/Tests/SentryProfilerTests/SentryTraceProfilerTests.swift
@@ -1,5 +1,5 @@
 import _SentryPrivate
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Helper/SentryEnabledFeaturesBuilderTests.swift b/Tests/SentryTests/Helper/SentryEnabledFeaturesBuilderTests.swift
index fa8f354600f..c3d3d537dc8 100644
--- a/Tests/SentryTests/Helper/SentryEnabledFeaturesBuilderTests.swift
+++ b/Tests/SentryTests/Helper/SentryEnabledFeaturesBuilderTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 final class SentryEnabledFeaturesBuilderTests: XCTestCase {
diff --git a/Tests/SentryTests/Helper/SentryFileManagerTests.swift b/Tests/SentryTests/Helper/SentryFileManagerTests.swift
index 80b8f25959c..c3eb07c7768 100644
--- a/Tests/SentryTests/Helper/SentryFileManagerTests.swift
+++ b/Tests/SentryTests/Helper/SentryFileManagerTests.swift
@@ -1,6 +1,6 @@
 // swiftlint:disable file_length
 
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Helper/SentryLog.swift b/Tests/SentryTests/Helper/SentryLog.swift
index 6b49aa9ca06..1c05376a5a4 100644
--- a/Tests/SentryTests/Helper/SentryLog.swift
+++ b/Tests/SentryTests/Helper/SentryLog.swift
@@ -1,6 +1,4 @@
-@testable import Sentry
-
-typealias SentryLog = Sentry.SentryLog
+@_spi(Private) @testable import Sentry
 
 //Exposing internal/test functions from SentryLog
 extension Sentry.SentryLog {
diff --git a/Tests/SentryTests/Helper/SentryLogTests.swift b/Tests/SentryTests/Helper/SentryLogTests.swift
index 36ccc1af5ba..f9d2745c80c 100644
--- a/Tests/SentryTests/Helper/SentryLogTests.swift
+++ b/Tests/SentryTests/Helper/SentryLogTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Helper/SentrySerializationTests.swift b/Tests/SentryTests/Helper/SentrySerializationTests.swift
index 6b15c3c496d..8edd32874f3 100644
--- a/Tests/SentryTests/Helper/SentrySerializationTests.swift
+++ b/Tests/SentryTests/Helper/SentrySerializationTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV1Tests.swift b/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV1Tests.swift
index 765ffbe2c53..d27335dddc6 100644
--- a/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV1Tests.swift
+++ b/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV1Tests.swift
@@ -1,5 +1,5 @@
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 #if os(iOS) || os(tvOS) || targetEnvironment(macCatalyst)
diff --git a/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV2Tests.swift b/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV2Tests.swift
index e67c9f954e3..fba77149f07 100644
--- a/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV2Tests.swift
+++ b/Tests/SentryTests/Integrations/ANR/SentryANRTrackerV2Tests.swift
@@ -1,5 +1,5 @@
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 #if os(iOS) || os(tvOS) || targetEnvironment(macCatalyst)
diff --git a/Tests/SentryTests/Integrations/Feedback/SentryFeedbackTests.swift b/Tests/SentryTests/Integrations/Feedback/SentryFeedbackTests.swift
index 35b232f3012..0bb3db2ede7 100644
--- a/Tests/SentryTests/Integrations/Feedback/SentryFeedbackTests.swift
+++ b/Tests/SentryTests/Integrations/Feedback/SentryFeedbackTests.swift
@@ -1,6 +1,7 @@
 import Foundation
 #if os(iOS) && !SENTRY_NO_UIKIT
-@testable import Sentry
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 class SentryFeedbackTests: XCTestCase {
diff --git a/Tests/SentryTests/Integrations/MetricKit/SentryMXCallStackTreeTests.swift b/Tests/SentryTests/Integrations/MetricKit/SentryMXCallStackTreeTests.swift
index a1a457aa801..3783e55b71d 100644
--- a/Tests/SentryTests/Integrations/MetricKit/SentryMXCallStackTreeTests.swift
+++ b/Tests/SentryTests/Integrations/MetricKit/SentryMXCallStackTreeTests.swift
@@ -1,5 +1,5 @@
 #if os(iOS) || os(macOS)
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 /**
diff --git a/Tests/SentryTests/Integrations/MetricKit/SentryMXManagerTests.swift b/Tests/SentryTests/Integrations/MetricKit/SentryMXManagerTests.swift
index d8cf62aa52a..d5503572f60 100644
--- a/Tests/SentryTests/Integrations/MetricKit/SentryMXManagerTests.swift
+++ b/Tests/SentryTests/Integrations/MetricKit/SentryMXManagerTests.swift
@@ -1,5 +1,5 @@
 import MetricKit
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Integrations/MetricKit/SentryMetricKitIntegrationTests.swift b/Tests/SentryTests/Integrations/MetricKit/SentryMetricKitIntegrationTests.swift
index 2b452dcca84..7e654524ad4 100644
--- a/Tests/SentryTests/Integrations/MetricKit/SentryMetricKitIntegrationTests.swift
+++ b/Tests/SentryTests/Integrations/MetricKit/SentryMetricKitIntegrationTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Integrations/Performance/AppStartTracking/SentryAppStartTrackingIntegrationTests.swift b/Tests/SentryTests/Integrations/Performance/AppStartTracking/SentryAppStartTrackingIntegrationTests.swift
index 64ee2b63ab0..808cc8c583a 100644
--- a/Tests/SentryTests/Integrations/Performance/AppStartTracking/SentryAppStartTrackingIntegrationTests.swift
+++ b/Tests/SentryTests/Integrations/Performance/AppStartTracking/SentryAppStartTrackingIntegrationTests.swift
@@ -1,5 +1,6 @@
 import _SentryPrivate
-import SentryTestUtils
+@_spi(Private) import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 #if os(iOS) || os(tvOS) || targetEnvironment(macCatalyst)
diff --git a/Tests/SentryTests/Integrations/Performance/SentryPerformanceTrackerTests.swift b/Tests/SentryTests/Integrations/Performance/SentryPerformanceTrackerTests.swift
index b1853bac97c..201ac57539d 100644
--- a/Tests/SentryTests/Integrations/Performance/SentryPerformanceTrackerTests.swift
+++ b/Tests/SentryTests/Integrations/Performance/SentryPerformanceTrackerTests.swift
@@ -1,4 +1,5 @@
-import SentryTestUtils
+@_spi(Private) import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 class SentryPerformanceTrackerTests: XCTestCase {
diff --git a/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerPerformanceTrackerTests.swift b/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerPerformanceTrackerTests.swift
index 45ab3b44eba..31b24f9b9e3 100644
--- a/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerPerformanceTrackerTests.swift
+++ b/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerPerformanceTrackerTests.swift
@@ -1,7 +1,7 @@
 #if os(iOS) || os(tvOS) || targetEnvironment(macCatalyst)
 
 import ObjectiveC
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerSwizzlingTests.swift b/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerSwizzlingTests.swift
index 71c0fbc38c6..22509bc2ab7 100644
--- a/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerSwizzlingTests.swift
+++ b/Tests/SentryTests/Integrations/Performance/UIViewController/SentryUIViewControllerSwizzlingTests.swift
@@ -1,6 +1,6 @@
 #if os(iOS) || os(tvOS) || targetEnvironment(macCatalyst)
 
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import SentryTestUtilsDynamic
 import XCTest
diff --git a/Tests/SentryTests/Integrations/SentryBaseIntegrationTests.swift b/Tests/SentryTests/Integrations/SentryBaseIntegrationTests.swift
index 5ae51c7b07f..181ce0e14c4 100644
--- a/Tests/SentryTests/Integrations/SentryBaseIntegrationTests.swift
+++ b/Tests/SentryTests/Integrations/SentryBaseIntegrationTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 class MyTestIntegration: SentryBaseIntegration {
diff --git a/Tests/SentryTests/Integrations/SentryCrash/SentryCrashIntegrationTests.swift b/Tests/SentryTests/Integrations/SentryCrash/SentryCrashIntegrationTests.swift
index b65357b2c1c..0a7db72e80c 100644
--- a/Tests/SentryTests/Integrations/SentryCrash/SentryCrashIntegrationTests.swift
+++ b/Tests/SentryTests/Integrations/SentryCrash/SentryCrashIntegrationTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Integrations/SessionReplay/SentryReplayEventTests.swift b/Tests/SentryTests/Integrations/SessionReplay/SentryReplayEventTests.swift
index 81a9edccfff..1fb718ba852 100644
--- a/Tests/SentryTests/Integrations/SessionReplay/SentryReplayEventTests.swift
+++ b/Tests/SentryTests/Integrations/SessionReplay/SentryReplayEventTests.swift
@@ -1,5 +1,5 @@
 import Foundation
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 class SentryReplayEventTests: XCTestCase {
diff --git a/Tests/SentryTests/Integrations/SessionReplay/SentryReplayRecordingTests.swift b/Tests/SentryTests/Integrations/SessionReplay/SentryReplayRecordingTests.swift
index 1441ac4b0fb..806a99d1259 100644
--- a/Tests/SentryTests/Integrations/SessionReplay/SentryReplayRecordingTests.swift
+++ b/Tests/SentryTests/Integrations/SessionReplay/SentryReplayRecordingTests.swift
@@ -1,5 +1,5 @@
 import Foundation
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 class SentryReplayRecordingTests: XCTestCase {
diff --git a/Tests/SentryTests/Integrations/SessionReplay/SentryReplayTypeTests.swift b/Tests/SentryTests/Integrations/SessionReplay/SentryReplayTypeTests.swift
index 3e0a7ab7b3d..b53a1d417e6 100644
--- a/Tests/SentryTests/Integrations/SessionReplay/SentryReplayTypeTests.swift
+++ b/Tests/SentryTests/Integrations/SessionReplay/SentryReplayTypeTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 class SentryReplayTypeTests: XCTestCase {
diff --git a/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayIntegrationTests.swift b/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayIntegrationTests.swift
index bcac44b2ca7..d0023839e30 100644
--- a/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayIntegrationTests.swift
+++ b/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayIntegrationTests.swift
@@ -1,6 +1,6 @@
 import Foundation
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 #if os(iOS) || os(tvOS)
diff --git a/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayTests.swift b/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayTests.swift
index 25895848f6d..bab8cf2d0d6 100644
--- a/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayTests.swift
+++ b/Tests/SentryTests/Integrations/SessionReplay/SentrySessionReplayTests.swift
@@ -1,6 +1,6 @@
 import Foundation
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 #if os(iOS) || os(tvOS)
diff --git a/Tests/SentryTests/Networking/SentryHttpTransportTests.swift b/Tests/SentryTests/Networking/SentryHttpTransportTests.swift
index e9513699d2c..5f8901da925 100644
--- a/Tests/SentryTests/Networking/SentryHttpTransportTests.swift
+++ b/Tests/SentryTests/Networking/SentryHttpTransportTests.swift
@@ -1,5 +1,5 @@
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 // swiftlint:disable file_length
diff --git a/Tests/SentryTests/Networking/SentrySpotlightTransportTests.swift b/Tests/SentryTests/Networking/SentrySpotlightTransportTests.swift
index 4d48c65cc71..8f0b640c2f8 100644
--- a/Tests/SentryTests/Networking/SentrySpotlightTransportTests.swift
+++ b/Tests/SentryTests/Networking/SentrySpotlightTransportTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/SentryClientTests.swift b/Tests/SentryTests/SentryClientTests.swift
index 8361473f3ac..000d024b25f 100644
--- a/Tests/SentryTests/SentryClientTests.swift
+++ b/Tests/SentryTests/SentryClientTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/SentryCrash/SentryCrashStackCursorSelfThreadTests.swift b/Tests/SentryTests/SentryCrash/SentryCrashStackCursorSelfThreadTests.swift
index 51cead22f8d..a485506995b 100644
--- a/Tests/SentryTests/SentryCrash/SentryCrashStackCursorSelfThreadTests.swift
+++ b/Tests/SentryTests/SentryCrash/SentryCrashStackCursorSelfThreadTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 final class SentryCrashStackCursorSelfThreadTests: XCTestCase {
diff --git a/Tests/SentryTests/SentryHubTests.swift b/Tests/SentryTests/SentryHubTests.swift
index d1700f2386a..db16f0f739b 100644
--- a/Tests/SentryTests/SentryHubTests.swift
+++ b/Tests/SentryTests/SentryHubTests.swift
@@ -1,5 +1,5 @@
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 // swiftlint:disable file_length
diff --git a/Tests/SentryTests/SentrySDKTests.swift b/Tests/SentryTests/SentrySDKTests.swift
index e8028a5e6cc..03f7e3ba66b 100644
--- a/Tests/SentryTests/SentrySDKTests.swift
+++ b/Tests/SentryTests/SentrySDKTests.swift
@@ -1,5 +1,5 @@
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 // swiftlint:disable file_length
diff --git a/Tests/SentryTests/SwiftDescriptorTests.swift b/Tests/SentryTests/SwiftDescriptorTests.swift
index 2e6f5a08127..50a9546963d 100644
--- a/Tests/SentryTests/SwiftDescriptorTests.swift
+++ b/Tests/SentryTests/SwiftDescriptorTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 class SwiftDescriptorTests: XCTestCase {
diff --git a/Tests/SentryTests/TestUtils/TestConncurrentModifications.swift b/Tests/SentryTests/TestUtils/TestConncurrentModifications.swift
index 5c6fb6ae5fd..cd2c51d7705 100644
--- a/Tests/SentryTests/TestUtils/TestConncurrentModifications.swift
+++ b/Tests/SentryTests/TestUtils/TestConncurrentModifications.swift
@@ -1,5 +1,6 @@
 import Foundation
-import SentryTestUtils
+@_spi(Private) import Sentry
+@_spi(Private) import SentryTestUtils
 
 func testConcurrentModifications(asyncWorkItems: Int = 5, writeLoopCount: Int = 1_000, writeWork: @escaping (Int) -> Void, readWork: @escaping () -> Void = {}) {
     // To not spam the test logs
diff --git a/Tests/SentryTests/Transaction/SentrySpanTests.swift b/Tests/SentryTests/Transaction/SentrySpanTests.swift
index a6744adb8e6..a757fbbd8b3 100644
--- a/Tests/SentryTests/Transaction/SentrySpanTests.swift
+++ b/Tests/SentryTests/Transaction/SentrySpanTests.swift
@@ -1,4 +1,4 @@
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import SentryTestUtils
 import XCTest
 
diff --git a/Tests/SentryTests/Transaction/SentryTracerTests.swift b/Tests/SentryTests/Transaction/SentryTracerTests.swift
index 6ebf46b62eb..7795242107d 100644
--- a/Tests/SentryTests/Transaction/SentryTracerTests.swift
+++ b/Tests/SentryTests/Transaction/SentryTracerTests.swift
@@ -1,6 +1,6 @@
 import _SentryPrivate
-@testable import Sentry
-import SentryTestUtils
+@_spi(Private) @testable import Sentry
+@_spi(Private) import SentryTestUtils
 import XCTest
 
 // swiftlint:disable file_length
diff --git a/Tests/SentryTests/URLSessionTaskHelperTests.swift b/Tests/SentryTests/URLSessionTaskHelperTests.swift
index c40f93548ec..3a7f72c68b3 100644
--- a/Tests/SentryTests/URLSessionTaskHelperTests.swift
+++ b/Tests/SentryTests/URLSessionTaskHelperTests.swift
@@ -1,5 +1,5 @@
 import Foundation
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 final class URLSessionTaskHelperTests: XCTestCase {
diff --git a/Tests/SentryTests/UrlSanitizedTests.swift b/Tests/SentryTests/UrlSanitizedTests.swift
index 2d46b7b5c30..cea22bb1801 100644
--- a/Tests/SentryTests/UrlSanitizedTests.swift
+++ b/Tests/SentryTests/UrlSanitizedTests.swift
@@ -1,5 +1,5 @@
 import Foundation
-@testable import Sentry
+@_spi(Private) @testable import Sentry
 import XCTest
 
 class UrlSanitizedTests: XCTestCase {
diff --git a/develop-docs/README.md b/develop-docs/README.md
index 61da01c908a..a5f99e00130 100644
--- a/develop-docs/README.md
+++ b/develop-docs/README.md
@@ -228,6 +228,10 @@ When making an Objective-C class public for Swift SDK code, do the following:
 - Add the import `@_implementationOnly import _SentryPrivate` to your Swift class that wants to use
   the Objective-C class.
 
+To make internal Swift code accessible to ObjC it needs to be `public`. This allows the ObjC header to be generated by Swift Package Manager.
+To discourage use outside of the SDK, add `@_spi(Private)` to these declarations. This ensures they can only be used when the import also
+adds the SPI attribute.
+
 ## Public Protocols
 
 pod lib lint fails with the warning duplicate protocol definition when including a public header for