diff --git a/tests/mock_logger.cpp b/tests/mock_logger.cpp
index 62054ed822..d37ed0556b 100644
--- a/tests/mock_logger.cpp
+++ b/tests/mock_logger.cpp
@@ -17,6 +17,8 @@
 
 #include "mock_logger.h"
 
+#include <fmt/format.h>
+
 #include <type_traits>
 
 namespace mp = multipass;
@@ -50,7 +52,9 @@ mpt::MockLogger::Scope::~Scope()
 
 void mpt::MockLogger::expect_log(mpl::Level lvl, const std::string& substr, const Cardinality& times)
 {
-    EXPECT_CALL(*this, log(lvl, _, HasSubstr(substr))).Times(times);
+    EXPECT_CALL(*this, log(lvl, _, HasSubstr(substr)))
+        .Times(times)
+        .Description(fmt::format("log(level: {}, substr: '{}')", logging::as_string(lvl), substr));
 }
 
 void mpt::MockLogger::screen_logs(mpl::Level lvl)