diff --git a/Lib/test/reperf.py b/Lib/test/reperf.py
index 7c68234..e93bacd 100644
--- a/Lib/test/reperf.py
+++ b/Lib/test/reperf.py
@@ -9,13 +9,13 @@
     timefunc(10, p.findall, s)
 
 def timefunc(n, func, *args, **kw):
-    t0 = time.clock()
+    t0 = time.perf_counter()
     try:
         for i in range(n):
             result = func(*args, **kw)
         return result
     finally:
-        t1 = time.clock()
+        t1 = time.perf_counter()
         if n > 1:
             print(n, "times", end=' ')
         print(func.__name__, "%.3f" % (t1-t0), "CPU seconds")
diff --git a/Lib/test/sortperf.py b/Lib/test/sortperf.py
index 0ce88de..af7c0b4 100644
--- a/Lib/test/sortperf.py
+++ b/Lib/test/sortperf.py
@@ -57,9 +57,9 @@
     sys.stdout.flush()
 
 def doit(L):
-    t0 = time.clock()
+    t0 = time.perf_counter()
     L.sort()
-    t1 = time.clock()
+    t1 = time.perf_counter()
     print("%6.2f" % (t1-t0), end=' ')
     flush()