diff --git a/android/app/build.gradle.kts b/android/app/build.gradle.kts
index 2358cc2..5a575d5 100644
--- a/android/app/build.gradle.kts
+++ b/android/app/build.gradle.kts
@@ -86,6 +86,17 @@ android {
     }
 }
 
+// Unit tests run against the debug variant only. The Compose test activity comes
+// from `ui-test-manifest`, a debug-only dependency, so the release variant's merged
+// manifest has no activity for `createComposeRule` to launch. The test sources are
+// variant-agnostic, so running them once (on debug) covers the same ground without
+// shipping a test activity in the release manifest.
+androidComponents {
+    beforeVariants(selector().withBuildType("release")) { variant ->
+        variant.enableUnitTest = false
+    }
+}
+
 dependencies {
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.activity.compose)