diff --git a/llvm/unittests/DebugInfo/MSF/MappedBlockStreamTest.cpp b/llvm/unittests/DebugInfo/MSF/MappedBlockStreamTest.cpp
index 3a3937e..ee52a09 100644
--- a/llvm/unittests/DebugInfo/MSF/MappedBlockStreamTest.cpp
+++ b/llvm/unittests/DebugInfo/MSF/MappedBlockStreamTest.cpp
@@ -42,7 +42,7 @@
 
   Error readBytes(uint32_t Offset, uint32_t Size,
                   ArrayRef<uint8_t> &Buffer) override {
-    if (auto EC = checkOffset(Offset, Size))
+    if (auto EC = checkOffsetForRead(Offset, Size))
       return EC;
     Buffer = Data.slice(Offset, Size);
     return Error::success();
@@ -50,7 +50,7 @@
 
   Error readLongestContiguousChunk(uint32_t Offset,
                                    ArrayRef<uint8_t> &Buffer) override {
-    if (auto EC = checkOffset(Offset, 1))
+    if (auto EC = checkOffsetForRead(Offset, 1))
       return EC;
     Buffer = Data.drop_front(Offset);
     return Error::success();
@@ -59,7 +59,7 @@
   uint32_t getLength() override { return Data.size(); }
 
   Error writeBytes(uint32_t Offset, ArrayRef<uint8_t> SrcData) override {
-    if (auto EC = checkOffset(Offset, SrcData.size()))
+    if (auto EC = checkOffsetForWrite(Offset, SrcData.size()))
       return EC;
     ::memcpy(&Data[Offset], SrcData.data(), SrcData.size());
     return Error::success();