diff --git a/grpc-client-runtime/build.gradle b/grpc-client-runtime/build.gradle
index 4d01ac9d6..cff90ad06 100644
--- a/grpc-client-runtime/build.gradle
+++ b/grpc-client-runtime/build.gradle
@@ -18,6 +18,7 @@ dependencies {
     implementation mn.micronaut.buffer.netty
 
     testCompileOnly libs.javax.annotation.api
+    testCompileOnly libs.managed.protobuf.java
 
     testImplementation projects.micronautGrpcServerRuntime
     testImplementation mn.micronaut.discovery.core
diff --git a/grpc-opentracing/build.gradle b/grpc-opentracing/build.gradle
index ce4edff2c..7af00a56c 100644
--- a/grpc-opentracing/build.gradle
+++ b/grpc-opentracing/build.gradle
@@ -20,6 +20,7 @@ dependencies {
     compileOnly libs.javax.annotation.api
 
     testCompileOnly libs.javax.annotation.api
+    testCompileOnly libs.managed.protobuf.java
 
     testImplementation projects.micronautGrpcServerRuntime
     testImplementation libs.managed.grpc.services
diff --git a/grpc-server-runtime/build.gradle b/grpc-server-runtime/build.gradle
index acc938f26..defb0c902 100644
--- a/grpc-server-runtime/build.gradle
+++ b/grpc-server-runtime/build.gradle
@@ -22,6 +22,7 @@ dependencies {
     implementation mn.micronaut.discovery.core
 
     testCompileOnly libs.javax.annotation.api
+    testCompileOnly libs.managed.protobuf.java
 
     testImplementation libs.managed.grpc.services
     testImplementation mn.micronaut.discovery.core
diff --git a/test-suite-groovy/build.gradle b/test-suite-groovy/build.gradle
index 1f8b924be..d5fcec3be 100644
--- a/test-suite-groovy/build.gradle
+++ b/test-suite-groovy/build.gradle
@@ -44,6 +44,7 @@ dependencies {
 
     testImplementation libs.groovy
 
+    testCompileOnly libs.managed.protobuf.java
     testRuntimeOnly mnLogging.logback.classic
 }
 
diff --git a/test-suite-java/build.gradle b/test-suite-java/build.gradle
index de896d17b..9c9a202a1 100644
--- a/test-suite-java/build.gradle
+++ b/test-suite-java/build.gradle
@@ -45,6 +45,7 @@ dependencies {
     testAnnotationProcessor mnValidation.micronaut.validation.processor
 
     testCompileOnly libs.javax.annotation.api
+    testCompileOnly libs.managed.protobuf.java
 }
 
 // tag::config[]
diff --git a/test-suite-kotlin/build.gradle b/test-suite-kotlin/build.gradle
index 680406c0e..3cc35d3a5 100644
--- a/test-suite-kotlin/build.gradle
+++ b/test-suite-kotlin/build.gradle
@@ -47,6 +47,7 @@ dependencies {
     implementation libs.managed.grpc.kotlin.stub
     implementation libs.managed.grpc.services
     compileOnly libs.managed.grpc.stub
+    compileOnly libs.managed.protobuf.java
     compileOnly libs.javax.annotation.api
     // end::dependencies[]