diff --git a/libc/test/src/string/bcopy_test.cpp b/libc/test/src/string/bcopy_test.cpp
--- a/libc/test/src/string/bcopy_test.cpp
+++ b/libc/test/src/string/bcopy_test.cpp
@@ -85,7 +85,7 @@
   LargeBuffer Buffer;
   Randomize(Buffer);
   for (int Size = 0; Size < kMaxSize; ++Size)
-    for (int Overlap = -1; Overlap < Size; ++Overlap) {
+    for (int Overlap = -1; Overlap < Size;) {
       ASSERT_TRUE(CheckMemmove<Adaptor>(Buffer, Size, Overlap));
       // Prevent quadratic behavior by skipping offset above kDenseOverlap.
       if (Overlap > kDenseOverlap)