diff --git a/include/cpputils/uuid.h b/include/cpputils/uuid.h
index fb60e9f..070c550 100644
--- a/include/cpputils/uuid.h
+++ b/include/cpputils/uuid.h
@@ -5,6 +5,7 @@
 #include <cstdint>
 #include <random>
 #include <string>
+#include "cpputils/datetime.h"
 
 namespace cpputils {
 namespace uuid {
@@ -46,7 +47,8 @@ class V7 {
     return timestamp;
   }
 
-  std::array<uint8_t, 16> generate();
+  std::array<uint8_t, 16> generate(
+      int64_t timestamp = cpputils::datetime::now());
 };
 
 }  // namespace uuid
diff --git a/src/uuid.cpp b/src/uuid.cpp
index c75802a..11ffbe1 100644
--- a/src/uuid.cpp
+++ b/src/uuid.cpp
@@ -88,9 +88,8 @@ uint8_t V7::next_sequence(int64_t current_timestamp) {
   }
 }
 
-std::array<uint8_t, 16> V7::generate() {
+std::array<uint8_t, 16> V7::generate(int64_t timestamp) {
   std::array<uint8_t, 16> uuid{};
-  int64_t timestamp = cpputils::datetime::now();
   uint8_t seq = next_sequence(timestamp);
   uint64_t rand_a = random64();
   uint64_t rand_b = random64();