diff --git a/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp b/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
index e72b810dd8c3b..c26643c6a2d63 100644
--- a/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
+++ b/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
@@ -545,6 +545,7 @@ TEST_F(RtsanOpenedFileTest, FtelloDieWhenRealtime) {
 
 TEST_F(RtsanOpenedFileTest, RewindDieWhenRealtime) {
   int end = fseek(GetOpenFile(), 0, SEEK_END);
+  EXPECT_THAT(end, Eq(0));
   auto Func = [this]() { rewind(GetOpenFile()); };
 
   ExpectRealtimeDeath(Func, "rewind");