diff --git a/instrumentation/quarkus-resteasy-reactive/quarkus2-testing/build.gradle.kts b/instrumentation/quarkus-resteasy-reactive/quarkus2-testing/build.gradle.kts
index 5de45394ba34..ef6a0332bef2 100644
--- a/instrumentation/quarkus-resteasy-reactive/quarkus2-testing/build.gradle.kts
+++ b/instrumentation/quarkus-resteasy-reactive/quarkus2-testing/build.gradle.kts
@@ -41,6 +41,8 @@ val quarkusTestCompileOnlyConfiguration by configurations.creating {
 val testModelPath = layout.buildDirectory.file("quarkus-app-test-model.dat").get().asFile.toPath()
 
 val buildModel = tasks.register("buildModel") {
+  dependsOn(configurations.named("testRuntimeClasspath"))
+
   if (testModelPath.notExists()) {
     doLast {
       val modelParameter = ModelParameterImpl()
diff --git a/instrumentation/quarkus-resteasy-reactive/quarkus3-testing/build.gradle.kts b/instrumentation/quarkus-resteasy-reactive/quarkus3-testing/build.gradle.kts
index e8ad601f0b7f..6623f8f6b3df 100644
--- a/instrumentation/quarkus-resteasy-reactive/quarkus3-testing/build.gradle.kts
+++ b/instrumentation/quarkus-resteasy-reactive/quarkus3-testing/build.gradle.kts
@@ -48,6 +48,8 @@ val quarkusTestCompileOnlyConfiguration by configurations.creating {
 val testModelPath = layout.buildDirectory.file("quarkus-app-test-model.dat").get().asFile.toPath()
 
 val buildModel = tasks.register("buildModel") {
+  dependsOn(configurations.named("testRuntimeClasspath"))
+
   if (testModelPath.notExists()) {
     doLast {
       val modelParameter = ModelParameterImpl()