diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
index c52cdd94..6cd6b59e 100644
--- a/.github/actions/build/action.yml
+++ b/.github/actions/build/action.yml
@@ -40,6 +40,11 @@ runs:
         path: ~/.gradle/caches
         key: gradle-v2-${{ hashFiles('**/*.gradle*', '**/gradle.properties', 'gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
         restore-keys: gradle-v2-
+    - uses: actions/cache@v6
+      with:
+        path: ~/.m2/repository/org/robolectric
+        key: robolectric-m2-v1-${{ hashFiles('gradle/libs.versions.toml', 'app/src/test/resources/robolectric.properties') }}
+        restore-keys: robolectric-m2-v1-
     - id: signing
       if: inputs.sign == 'true'
       shell: bash
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 4411b117..916d4dac 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -181,6 +181,8 @@ val demoScreenshotClass = "com.subtracks.ui.DemoScreenshotTest"
 val queryTimingClass = "com.subtracks.data.db.QueryTimingMeasurementTest"
 
 tasks.withType<Test>().configureEach {
+    // Robolectric fetches its Android SDK jar itself, outside Gradle's repositories.
+    systemProperty("robolectric.dependency.repo.url", providers.gradleProperty("mavenCentralMirrorUrl").get())
     if (name.endsWith("UnitTest")) {
         filter {
             (integrationTestClasses + demoScreenshotClass + queryTimingClass).forEach { excludeTestsMatching(it) }
diff --git a/gradle.properties b/gradle.properties
index 889e554e..507ee849 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,3 +9,5 @@ android.useAndroidX=true
 android.nonTransitiveRClass=true
 
 kotlin.code.style=official
+
+mavenCentralMirrorUrl=https://maven-central.storage-download.googleapis.com/maven2/
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 5ff0b01d..ff7949bc 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,4 +1,5 @@
 pluginManagement {
+    val mavenCentralMirrorUrl = providers.gradleProperty("mavenCentralMirrorUrl").get()
     repositories {
         google {
             content {
@@ -7,7 +8,7 @@ pluginManagement {
                 includeGroupByRegex("androidx.*")
             }
         }
-        maven("https://maven-central.storage-download.googleapis.com/maven2/") {
+        maven(mavenCentralMirrorUrl) {
             name = "MavenCentralMirror"
         }
         mavenCentral()
@@ -19,7 +20,7 @@ dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
     repositories {
         google()
-        maven("https://maven-central.storage-download.googleapis.com/maven2/") {
+        maven(providers.gradleProperty("mavenCentralMirrorUrl").get()) {
             name = "MavenCentralMirror"
         }
         mavenCentral()