diff --git a/src/bench/examples.cpp b/src/bench/examples.cpp
--- a/src/bench/examples.cpp
+++ b/src/bench/examples.cpp
@@ -9,7 +9,7 @@
 // min/max/average should be close to 100ms.
 static void Sleep100ms(benchmark::State &state) {
     while (state.KeepRunning()) {
-        MilliSleep(100);
+        UninterruptibleSleep(std::chrono::milliseconds{100});
     }
 }
 
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -601,7 +601,7 @@
                 break;
             } catch (const CConnectionFailed &) {
                 if (fWait) {
-                    MilliSleep(1000);
+                    UninterruptibleSleep(std::chrono::milliseconds{1000});
                 } else {
                     throw;
                 }
diff --git a/src/bitcoind.cpp b/src/bitcoind.cpp
--- a/src/bitcoind.cpp
+++ b/src/bitcoind.cpp
@@ -51,7 +51,7 @@
 
 static void WaitForShutdown(NodeContext &node) {
     while (!ShutdownRequested()) {
-        MilliSleep(200);
+        UninterruptibleSleep(std::chrono::milliseconds{200});
     }
     Interrupt(node);
 }
diff --git a/src/httprpc.cpp b/src/httprpc.cpp
--- a/src/httprpc.cpp
+++ b/src/httprpc.cpp
@@ -320,7 +320,8 @@
          * If this results in a DoS the user really shouldn't have their RPC
          * port exposed.
          */
-        MilliSleep(RPC_AUTH_BRUTE_FORCE_DELAY);
+        UninterruptibleSleep(
+            std::chrono::milliseconds{RPC_AUTH_BRUTE_FORCE_DELAY});
 
         req->WriteHeader("WWW-Authenticate", WWW_AUTH_HEADER_DATA);
         req->WriteReply(HTTP_UNAUTHORIZED);
diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -218,7 +218,8 @@
     // this reply will get back to the client.
     StartShutdown();
     if (jsonRequest.params[0].isNum()) {
-        MilliSleep(jsonRequest.params[0].get_int());
+        UninterruptibleSleep(
+            std::chrono::milliseconds{jsonRequest.params[0].get_int()});
     }
     return "Bitcoin server stopping";
 }
diff --git a/src/test/blockfilter_index_tests.cpp b/src/test/blockfilter_index_tests.cpp
--- a/src/test/blockfilter_index_tests.cpp
+++ b/src/test/blockfilter_index_tests.cpp
@@ -143,7 +143,7 @@
     int64_t time_start = GetTimeMillis();
     while (!filter_index.BlockUntilSyncedToCurrentChain()) {
         BOOST_REQUIRE(time_start + timeout_ms > GetTimeMillis());
-        MilliSleep(100);
+        UninterruptibleSleep(std::chrono::milliseconds{100});
     }
 
     // Check that filter index has all blocks that were in the chain before it
diff --git a/src/test/checkqueue_tests.cpp b/src/test/checkqueue_tests.cpp
--- a/src/test/checkqueue_tests.cpp
+++ b/src/test/checkqueue_tests.cpp
@@ -367,7 +367,7 @@
                 CCheckQueueControl<FakeCheck> control(queue.get());
                 // While sleeping, no other thread should execute to this point
                 auto observed = ++nThreads;
-                MilliSleep(10);
+                UninterruptibleSleep(std::chrono::milliseconds{10});
                 fails += observed != nThreads;
             });
         }
diff --git a/src/test/txindex_tests.cpp b/src/test/txindex_tests.cpp
--- a/src/test/txindex_tests.cpp
+++ b/src/test/txindex_tests.cpp
@@ -37,7 +37,7 @@
     int64_t time_start = GetTimeMillis();
     while (!txindex.BlockUntilSyncedToCurrentChain()) {
         BOOST_REQUIRE(time_start + timeout_ms > GetTimeMillis());
-        MilliSleep(100);
+        UninterruptibleSleep(std::chrono::milliseconds{100});
     }
 
     // Check that txindex excludes genesis block transactions.
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -1483,7 +1483,7 @@
     SetMockTime(111);
     // Check that mock time does not change after a sleep
     for (const auto &num_sleep : {0, 1}) {
-        MilliSleep(num_sleep);
+        UninterruptibleSleep(std::chrono::milliseconds{num_sleep});
         BOOST_CHECK_EQUAL(111, GetTime()); // Deprecated time getter
         BOOST_CHECK_EQUAL(111, GetTime<std::chrono::seconds>().count());
         BOOST_CHECK_EQUAL(111000, GetTime<std::chrono::milliseconds>().count());
@@ -1495,7 +1495,7 @@
     // Check that system time changes after a sleep
     const auto ms_0 = GetTime<std::chrono::milliseconds>();
     const auto us_0 = GetTime<std::chrono::microseconds>();
-    MilliSleep(1);
+    UninterruptibleSleep(std::chrono::milliseconds{1});
     BOOST_CHECK(ms_0 < GetTime<std::chrono::milliseconds>());
     BOOST_CHECK(us_0 < GetTime<std::chrono::microseconds>());
 }
diff --git a/src/test/validation_block_tests.cpp b/src/test/validation_block_tests.cpp
--- a/src/test/validation_block_tests.cpp
+++ b/src/test/validation_block_tests.cpp
@@ -203,7 +203,7 @@
         t.join();
     }
     while (GetMainSignals().CallbacksPending() > 0) {
-        MilliSleep(100);
+        UninterruptibleSleep(std::chrono::milliseconds{100});
     }
 
     UnregisterValidationInterface(&sub);
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -812,7 +812,7 @@
                 return fSuccess;
             }
         }
-        MilliSleep(100);
+        UninterruptibleSleep(std::chrono::milliseconds{100});
     }
 }
 
@@ -956,7 +956,7 @@
                 }
             }
         }
-        MilliSleep(100);
+        UninterruptibleSleep(std::chrono::milliseconds{100});
     }
 }