diff --git a/completion.go b/completion.go
index 44057616f..5eec88c29 100644
--- a/completion.go
+++ b/completion.go
@@ -9,7 +9,7 @@ import (
 var (
 	ErrCompletionUnsupportedModel              = errors.New("this model is not supported with this method, please use CreateChatCompletion client method instead") //nolint:lll
 	ErrCompletionStreamNotSupported            = errors.New("streaming is not supported with this method, please use CreateCompletionStream")                      //nolint:lll
-	ErrCompletionRequestPromptTypeNotSupported = errors.New("the type of CompletionRequest.Promp only supports string and []string")                               //nolint:lll
+	ErrCompletionRequestPromptTypeNotSupported = errors.New("the type of CompletionRequest.Prompt only supports string and []string")                              //nolint:lll
 )
 
 // GPT3 Defines the models provided by OpenAI to use when generating
diff --git a/request_builder_test.go b/request_builder_test.go
index e5b65df0c..b1adbf1c6 100644
--- a/request_builder_test.go
+++ b/request_builder_test.go
@@ -145,6 +145,11 @@ func TestClientReturnsRequestBuilderErrors(t *testing.T) {
 	if !errors.Is(err, errTestRequestBuilderFailed) {
 		t.Fatalf("Did not return error when request builder failed: %v", err)
 	}
+
+	_, err = client.CreateCompletionStream(ctx, CompletionRequest{Prompt: ""})
+	if !errors.Is(err, errTestRequestBuilderFailed) {
+		t.Fatalf("Did not return error when request builder failed: %v", err)
+	}
 }
 
 func TestReturnsRequestBuilderErrorsAddtion(t *testing.T) {