diff --git a/LunaTranslator/LunaTranslator/textsource/texthook.py b/LunaTranslator/LunaTranslator/textsource/texthook.py
index b59c9de0..e8f2e582 100644
--- a/LunaTranslator/LunaTranslator/textsource/texthook.py
+++ b/LunaTranslator/LunaTranslator/textsource/texthook.py
@@ -446,8 +446,11 @@ class texthook(basetext):
 
             _data, tms = self.newline_delaywait.get()
             collector.append(_data)
-            now = time.time()
-            time.sleep(min(now - tms, self.config["textthreaddelay"])/1000)
+            targettime = tms + self.config["textthreaddelay"]
+            sleepdur = targettime - time.time()
+            sleepdur = max(0, sleepdur)
+            sleepdur /= 1000
+            time.sleep(sleepdur)
             if not self.newline_delaywait.empty():
                 continue
 
diff --git a/build.py b/build.py
index 9bdbc154..1c83336e 100644
--- a/build.py
+++ b/build.py
@@ -289,4 +289,5 @@ if __name__ == "__main__":
     subprocess.run(f"{py37Path} -m pip install -r requirements.txt")
     # 3.8之后会莫名其妙引用这个b东西，然后这个b东西会把一堆没用的东西导入进来
     shutil.rmtree(os.path.join(os.path.dirname(py37Path), "Lib\\test"))
+    shutil.rmtree(os.path.join(os.path.dirname(py37Path), "Lib\\unittest"))
     subprocess.run(f"{py37Path} retrieval.py")