diff --git a/tests/ResultReportTest.cpp b/tests/ResultReportTest.cpp
index 2fe6c2fe..9c3b709b 100644
--- a/tests/ResultReportTest.cpp
+++ b/tests/ResultReportTest.cpp
@@ -68,7 +68,7 @@ TEST_CASE("ResultReport_Render", "[Diagnostics]") {
     const auto text = RenderResultReport("prefix", "in.h5", x, result);
 
     // The stable keys a consumer greps for.
-    CHECK(text.find("\nREPORT_VERSION= 1\n") != std::string::npos);
+    CHECK(text.find("\nREPORT_VERSION= 2\n") != std::string::npos);
     CHECK(text.find("\nOUTPUT_PREFIX= prefix\n") != std::string::npos);
     CHECK(text.find("\nINDEXING_RATE= 0.8700\n") != std::string::npos);
     CHECK(text.find("\nSPACE_GROUP_NUMBER= 96\n") != std::string::npos);