diff --git a/e2e-test-app/src/test/java/com/sap/ai/sdk/app/controllers/OpenAiTest.java b/e2e-test-app/src/test/java/com/sap/ai/sdk/app/controllers/OpenAiTest.java
index c37aff530..2973239a4 100644
--- a/e2e-test-app/src/test/java/com/sap/ai/sdk/app/controllers/OpenAiTest.java
+++ b/e2e-test-app/src/test/java/com/sap/ai/sdk/app/controllers/OpenAiTest.java
@@ -39,7 +39,7 @@ void streamChatCompletion() {
             .setMessages(List.of(new OpenAiChatUserMessage().addText("Who is the prettiest?")));
 
     final var totalOutput = new OpenAiChatCompletionOutput();
-    final var emptyDeltaCount = new AtomicInteger(0);
+    final var filledDeltaCount = new AtomicInteger(0);
     OpenAiClient.forModel(GPT_35_TURBO)
         .streamChatCompletionDeltas(request)
         .peek(totalOutput::addDelta)
@@ -47,15 +47,15 @@ void streamChatCompletion() {
         .forEach(
             delta -> {
               final String deltaContent = delta.getDeltaContent();
-              log.info("deltaContent: {}", deltaContent);
-              if (deltaContent.isEmpty()) {
-                emptyDeltaCount.incrementAndGet();
+              log.info("delta: {}", delta);
+              if (!deltaContent.isEmpty()) {
+                filledDeltaCount.incrementAndGet();
               }
             });
 
     // the first two and the last delta don't have any content
     // see OpenAiChatCompletionDelta#getDeltaContent
-    assertThat(emptyDeltaCount.get()).isLessThanOrEqualTo(3);
+    assertThat(filledDeltaCount.get()).isGreaterThan(0);
 
     assertThat(totalOutput.getChoices()).isNotEmpty();
     assertThat(totalOutput.getChoices().get(0).getMessage().getContent()).isNotEmpty();
diff --git a/foundation-models/openai/src/main/java/com/sap/ai/sdk/foundationmodels/openai/model/StreamedDelta.java b/foundation-models/openai/src/main/java/com/sap/ai/sdk/foundationmodels/openai/model/StreamedDelta.java
index ac790901c..f426bf34f 100644
--- a/foundation-models/openai/src/main/java/com/sap/ai/sdk/foundationmodels/openai/model/StreamedDelta.java
+++ b/foundation-models/openai/src/main/java/com/sap/ai/sdk/foundationmodels/openai/model/StreamedDelta.java
@@ -17,7 +17,7 @@ public interface StreamedDelta {
    *
    * <p>Note: If there are multiple choices only the first one is returned
    *
-   * <p>Note: The first two and the last delta do not contain any content
+   * <p>Note: Some deltas do not contain any content
    *
    * @return the message content or empty string.
    */