diff --git a/theodolite/build.gradle b/theodolite/build.gradle
index a066e94f09b71720f9392947640b077b153ccb9c..521137d7315de193f26fdf2307155e587c0dd921 100644
--- a/theodolite/build.gradle
+++ b/theodolite/build.gradle
@@ -59,6 +59,12 @@ compileTestKotlin {
     kotlinOptions.jvmTarget = JavaVersion.VERSION_11
 }
 
+test {
+    // Required because of https://github.com/quarkusio/quarkus/issues/18973
+    minHeapSize = "256m"
+    maxHeapSize = "1024m"
+}
+
 detekt {
     failFast = true // fail build on any finding
     buildUponDefaultConfig = true