diff --git a/src/logging.cpp b/src/logging.cpp
--- a/src/logging.cpp
+++ b/src/logging.cpp
@@ -192,10 +192,10 @@
             strStamped.pop_back();
             strStamped += strprintf(".%06dZ", nTimeMicros % 1000000);
         }
-        int64_t mocktime = GetMockTime();
-        if (mocktime) {
-            strStamped +=
-                " (mocktime: " + FormatISO8601DateTime(mocktime) + ")";
+        std::chrono::seconds mocktime = GetMockTime();
+        if (mocktime > 0s) {
+            strStamped += " (mocktime: " +
+                          FormatISO8601DateTime(count_seconds(mocktime)) + ")";
         }
         strStamped += ' ' + str;
     } else {
diff --git a/src/util/time.h b/src/util/time.h
--- a/src/util/time.h
+++ b/src/util/time.h
@@ -62,8 +62,9 @@
 
 /** For testing. Set e.g. with the setmocktime rpc, or -mocktime argument */
 void SetMockTime(int64_t nMockTimeIn);
+
 /** For testing */
-int64_t GetMockTime();
+std::chrono::seconds GetMockTime();
 
 /** Return system time (or mocked time, if set) */
 template <typename T> T GetTime();
diff --git a/src/util/time.cpp b/src/util/time.cpp
--- a/src/util/time.cpp
+++ b/src/util/time.cpp
@@ -96,8 +96,8 @@
     nMockTime.store(nMockTimeIn, std::memory_order_relaxed);
 }
 
-int64_t GetMockTime() {
-    return nMockTime.load(std::memory_order_relaxed);
+std::chrono::seconds GetMockTime() {
+    return std::chrono::seconds(nMockTime.load(std::memory_order_relaxed));
 }
 
 int64_t GetTimeMillis() {