diff --git a/.github/workflows/common.yml b/.github/workflows/common.yml
index 4af29b0f68b..052d6e8d1c3 100644
--- a/.github/workflows/common.yml
+++ b/.github/workflows/common.yml
@@ -52,6 +52,12 @@ on:
         required: false
         default: ""
 
+      # Whether the job is scheduled. Defaults to false.
+      is_nightly:
+        type: boolean
+        required: false
+        default: false
+
     outputs:
       cache_key:
         description: "The cache key for the Swift package resolution."
@@ -86,6 +92,8 @@ jobs:
     # Run on the main repo's scheduled jobs or pull requests and manual workflow invocations.
     if: (github.repository == 'firebase/firebase-ios-sdk' && github.event_name == 'schedule') || contains(fromJSON('["pull_request", "workflow_dispatch"]'), github.event_name)
     needs: [spm-package-resolved]
+    env:
+        FIREBASE_IS_NIGHTLY_TESTING: ${{ inputs.is_nightly && '1' || '' }}
     strategy:
       matrix:
         os: [macos-15]
@@ -114,6 +122,8 @@ jobs:
       run: scripts/setup_spm_tests.sh
     - uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
       if: contains(join(inputs.platforms), matrix.platform) || matrix.os == 'macos-14'
+      env:
+        FIREBASE_IS_NIGHTLY_TESTING: ${{ inputs.is_nightly && '1' || '' }}
       with:
         timeout_minutes: 15
         max_attempts: 3
diff --git a/.github/workflows/crashlytics.yml b/.github/workflows/crashlytics.yml
index 3969c1eb223..341da63a063 100644
--- a/.github/workflows/crashlytics.yml
+++ b/.github/workflows/crashlytics.yml
@@ -30,6 +30,7 @@ jobs:
     uses: ./.github/workflows/common.yml
     with:
       target: FirebaseCrashlyticsUnit
+      is_nightly: ${{ github.event_name == 'schedule' }}
 
   catalyst:
     uses: ./.github/workflows/common_catalyst.yml
diff --git a/Crashlytics/Crashlytics/Models/FIRCLSSettings.m b/Crashlytics/Crashlytics/Models/FIRCLSSettings.m
index 758772e5b8d..80c70a48953 100644
--- a/Crashlytics/Crashlytics/Models/FIRCLSSettings.m
+++ b/Crashlytics/Crashlytics/Models/FIRCLSSettings.m
@@ -190,7 +190,9 @@ - (NSDictionary *)loadCacheKey {
 
 - (void)deleteCachedSettings {
   __weak FIRCLSSettings *weakSelf = self;
+#ifndef FIREBASE_IS_NIGHTLY_TESTING
   dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
+#endif
     __strong FIRCLSSettings *strongSelf = weakSelf;
     if ([strongSelf.fileManager fileExistsAtPath:strongSelf.fileManager.settingsFilePath]) {
       [strongSelf.fileManager removeItemAtPath:strongSelf.fileManager.settingsFilePath];
@@ -198,7 +200,9 @@ - (void)deleteCachedSettings {
     if ([strongSelf.fileManager fileExistsAtPath:strongSelf.fileManager.settingsCacheKeyPath]) {
       [strongSelf.fileManager removeItemAtPath:strongSelf.fileManager.settingsCacheKeyPath];
     }
+#ifndef FIREBASE_IS_NIGHTLY_TESTING
   });
+#endif
 
   @synchronized(self) {
     self.isCacheKeyExpired = YES;
diff --git a/Package.swift b/Package.swift
index 4e2502a8586..de5871e591a 100644
--- a/Package.swift
+++ b/Package.swift
@@ -555,61 +555,7 @@ let package = Package(
       ],
       path: "FirebaseCombineSwift/Sources/Storage"
     ),
-    .target(
-      name: "FirebaseCrashlytics",
-      dependencies: [
-        "FirebaseCore",
-        "FirebaseInstallations",
-        "FirebaseSessions",
-        "FirebaseRemoteConfigInterop",
-        "FirebaseCrashlyticsSwift",
-        .product(name: "GoogleDataTransport", package: "GoogleDataTransport"),
-        .product(name: "GULEnvironment", package: "GoogleUtilities"),
-        .product(name: "FBLPromises", package: "Promises"),
-        .product(name: "nanopb", package: "nanopb"),
-      ],
-      path: "Crashlytics",
-      exclude: [
-        "run",
-        "CHANGELOG.md",
-        "LICENSE",
-        "README.md",
-        "ProtoSupport/",
-        "UnitTests/",
-        "generate_project.sh",
-        "upload-symbols",
-        "CrashlyticsInputFiles.xcfilelist",
-        "third_party/libunwind/LICENSE",
-        "Crashlytics/Rollouts/",
-      ],
-      sources: [
-        "Crashlytics/",
-        "Protogen/",
-        "Shared/",
-        "third_party/libunwind/dwarf.h",
-      ],
-      resources: [.process("Resources/PrivacyInfo.xcprivacy")],
-      publicHeadersPath: "Crashlytics/Public",
-      cSettings: [
-        .headerSearchPath(".."),
-        .define("DISPLAY_VERSION", to: firebaseVersion),
-        .define("CLS_SDK_NAME", to: "Crashlytics iOS SDK", .when(platforms: [.iOS])),
-        .define(
-          "CLS_SDK_NAME",
-          to: "Crashlytics macOS SDK",
-          .when(platforms: [.macOS, .macCatalyst])
-        ),
-        .define("CLS_SDK_NAME", to: "Crashlytics tvOS SDK", .when(platforms: [.tvOS])),
-        .define("CLS_SDK_NAME", to: "Crashlytics watchOS SDK", .when(platforms: [.watchOS])),
-        .define("PB_FIELD_32BIT", to: "1"),
-        .define("PB_NO_PACKED_STRUCTS", to: "1"),
-        .define("PB_ENABLE_MALLOC", to: "1"),
-      ],
-      linkerSettings: [
-        .linkedFramework("Security"),
-        .linkedFramework("SystemConfiguration", .when(platforms: [.iOS, .macOS, .tvOS])),
-      ]
-    ),
+    firebaseCrashlyticsTarget(),
     .target(
       name: "FirebaseCrashlyticsSwift",
       dependencies: ["FirebaseRemoteConfigInterop"],
@@ -1402,6 +1348,69 @@ let package = Package(
 
 // MARK: - Helper Functions
 
+func firebaseCrashlyticsTarget() -> Target {
+  var cSettings: [CSetting] = [
+    .headerSearchPath(".."),
+    .define("DISPLAY_VERSION", to: firebaseVersion),
+    .define("CLS_SDK_NAME", to: "Crashlytics iOS SDK", .when(platforms: [.iOS])),
+    .define(
+      "CLS_SDK_NAME", to: "Crashlytics macOS SDK",
+      .when(platforms: [.macOS, .macCatalyst])
+    ),
+    .define("CLS_SDK_NAME", to: "Crashlytics tvOS SDK", .when(platforms: [.tvOS])),
+    .define("CLS_SDK_NAME", to: "Crashlytics watchOS SDK", .when(platforms: [.watchOS])),
+    .define("PB_FIELD_32BIT", to: "1"),
+    .define("PB_NO_PACKED_STRUCTS", to: "1"),
+    .define("PB_ENABLE_MALLOC", to: "1"),
+  ]
+
+  if Context.environment["FIREBASE_IS_NIGHTLY_TESTING"] != nil {
+    cSettings += [.define("FIREBASE_IS_NIGHTLY_TESTING", to: "1")]
+  }
+
+  return .target(
+    name: "FirebaseCrashlytics",
+    dependencies: [
+      "FirebaseCore",
+      "FirebaseInstallations",
+      "FirebaseSessions",
+      "FirebaseRemoteConfigInterop",
+      "FirebaseCrashlyticsSwift",
+      .product(name: "GoogleDataTransport", package: "GoogleDataTransport"),
+      .product(name: "GULEnvironment", package: "GoogleUtilities"),
+      .product(name: "FBLPromises", package: "Promises"),
+      .product(name: "nanopb", package: "nanopb"),
+    ],
+    path: "Crashlytics",
+    exclude: [
+      "run",
+      "CHANGELOG.md",
+      "LICENSE",
+      "README.md",
+      "ProtoSupport/",
+      "UnitTests/",
+      "generate_project.sh",
+      "upload-symbols",
+      "CrashlyticsInputFiles.xcfilelist",
+      "third_party/libunwind/LICENSE",
+      "Crashlytics/Rollouts/",
+    ],
+    sources: [
+      "Crashlytics/",
+      "Protogen/",
+      "Shared/",
+      "third_party/libunwind/dwarf.h",
+    ],
+    resources: [.process("Resources/PrivacyInfo.xcprivacy")],
+    publicHeadersPath: "Crashlytics/Public",
+    cSettings: cSettings,
+    linkerSettings: [
+      .linkedFramework("Security"),
+      .linkedFramework("SystemConfiguration", .when(platforms: [.iOS, .macOS, .tvOS])),
+    ]
+  )
+}
+
 func googleAppMeasurementDependency() -> Package.Dependency {
   let appMeasurementURL = "https://github.com/google/GoogleAppMeasurement.git"