diff --git a/phosphor-regulators/test/mock_journal.cpp b/phosphor-regulators/test/mock_journal.cpp
index 2446182..e5c8ab9 100644
--- a/phosphor-regulators/test/mock_journal.cpp
+++ b/phosphor-regulators/test/mock_journal.cpp
@@ -36,10 +36,16 @@
  */
 static std::vector<std::string> infoMessages{};
 
+/**
+ * Mock journal messages with a priority value of 'DEBUG'.
+ */
+static std::vector<std::string> debugMessages{};
+
 void clear()
 {
     errMessages.clear();
     infoMessages.clear();
+    debugMessages.clear();
 }
 
 const std::vector<std::string>& getErrMessages()
@@ -52,6 +58,11 @@
     return infoMessages;
 }
 
+const std::vector<std::string>& getDebugMessages()
+{
+    return debugMessages;
+}
+
 void logErr(const std::string& message)
 {
     errMessages.emplace_back(message);
@@ -62,4 +73,9 @@
     infoMessages.emplace_back(message);
 }
 
+void logDebug(const std::string& message)
+{
+    debugMessages.emplace_back(message);
+}
+
 } // namespace phosphor::power::regulators::journal