diff --git a/internal/attestation/collector.go b/internal/attestation/collector.go
index 0a0ce1f8..c603dbea 100644
--- a/internal/attestation/collector.go
+++ b/internal/attestation/collector.go
@@ -81,6 +81,8 @@ func (c *cliEvidenceCollector) Collect(ctx context.Context, nonce string) (*SDKR
 			parseErr, stderr.String(), stdout.String(), errText,
 		)
 	}
+	response.ResultMessage = fmt.Sprintf("%s | raw_stderr: %s", response.ResultMessage, stderr.String())
+
 	fields := []interface{}{
 		"result_code", response.ResultCode,
 		"result_message", response.ResultMessage,
diff --git a/internal/attestation/collector_test.go b/internal/attestation/collector_test.go
index 5db058f1..7726416e 100644
--- a/internal/attestation/collector_test.go
+++ b/internal/attestation/collector_test.go
@@ -54,7 +54,7 @@ func TestCLIEvidenceCollectorParsesResponse(t *testing.T) {
 	resp, err := collector.Collect(context.Background(), "abc123")
 	require.NoError(t, err)
 	require.Equal(t, 200, resp.ResultCode)
-	require.Equal(t, "ok", resp.ResultMessage)
+	require.Contains(t, resp.ResultMessage, "ok | raw_stderr:")
 	require.Len(t, resp.Evidences, 1)
 	require.Equal(t, "BLACKWELL", resp.Evidences[0].Arch)
 	require.Equal(t, "550.120", resp.Evidences[0].DriverVersion)