diff --git a/src/microcks-async-minion-container.ts b/src/microcks-async-minion-container.ts
index 5d0d04d..454eb6b 100644
--- a/src/microcks-async-minion-container.ts
+++ b/src/microcks-async-minion-container.ts
@@ -23,9 +23,16 @@ export class MicrocksAsyncMinionContainer extends GenericContainer {
   private network: StartedNetwork;
   private extraProtocols: string = "";
   
-  constructor(network: StartedNetwork, image = "quay.io/microcks/microcks-uber-async-minion:1.8.1") {
+  constructor(network: StartedNetwork, image = "quay.io/microcks/microcks-uber-async-minion:1.9.0") {
     super(image);
     this.network = network;
+    this.withNetwork(this.network)
+        .withNetworkAliases("microcks-async-minion")
+        .withEnvironment({
+          MICROCKS_HOST_PORT: "microcks:" + MicrocksContainer.MICROCKS_HTTP_PORT
+        })
+        .withExposedPorts(MicrocksAsyncMinionContainer.MICROCKS_ASYNC_MINION_HTTP_PORT)
+        .withWaitStrategy(Wait.forLogMessage(/.*Profile prod activated\..*/, 1));
   }
 
   /**
@@ -85,14 +92,6 @@ export class MicrocksAsyncMinionContainer extends GenericContainer {
   }
 
   public override async start(): Promise<StartedMicrocksAsyncMinionContainer> {
-    this.withNetwork(this.network)
-        .withNetworkAliases("microcks-async-minion")
-        .withEnvironment({
-          MICROCKS_HOST_PORT: "microcks:" + MicrocksContainer.MICROCKS_HTTP_PORT
-        })
-        .withExposedPorts(...(this.hasExposedPorts ? this.exposedPorts : [MicrocksAsyncMinionContainer.MICROCKS_ASYNC_MINION_HTTP_PORT]))
-        .withWaitStrategy(Wait.forLogMessage(/.*Profile prod activated\..*/, 1));
-
     return new StartedMicrocksAsyncMinionContainer(await super.start());
   }
 
diff --git a/src/microcks-container.ts b/src/microcks-container.ts
index a2f2ad5..b60e72c 100644
--- a/src/microcks-container.ts
+++ b/src/microcks-container.ts
@@ -27,6 +27,8 @@ export class MicrocksContainer extends GenericContainer {
 
   constructor(image = "quay.io/microcks/microcks-uber:1.9.0") {
     super(image);
+    this.withExposedPorts(MicrocksContainer.MICROCKS_HTTP_PORT, MicrocksContainer.MICROCKS_GRPC_PORT)
+        .withWaitStrategy(Wait.forLogMessage(/.*Started MicrocksApplication.*/, 1));
   }
 
   /**
@@ -70,9 +72,6 @@ export class MicrocksContainer extends GenericContainer {
   }
 
   public override async start(): Promise<StartedMicrocksContainer> {
-    this.withExposedPorts(...(this.hasExposedPorts ? this.exposedPorts : [MicrocksContainer.MICROCKS_HTTP_PORT, MicrocksContainer.MICROCKS_GRPC_PORT]))
-        .withWaitStrategy(Wait.forLogMessage(/.*Started MicrocksApplication.*/, 1));
-
     let startedContainer = new StartedMicrocksContainer(await super.start());
     // Import artifacts declared in configuration. 
     for (let i=0; i<this.mainArtifacts.length; i++) {