Index: lldb/unittests/Core/DumpDataExtractorTest.cpp
===================================================================
--- lldb/unittests/Core/DumpDataExtractorTest.cpp
+++ lldb/unittests/Core/DumpDataExtractorTest.cpp
@@ -199,9 +199,11 @@
   TestDump(std::vector<uint16_t>{0xabcd, 0x1234},
            lldb::Format::eFormatVectorOfFloat16, "{-0.0609436 0.000757217}");
 
+#if !defined(__riscv)
   // quiet/signaling NaNs.
   TestDump(std::vector<uint16_t>{0xffff, 0xffc0, 0x7fff, 0x7fc0},
            lldb::Format::eFormatVectorOfFloat16, "{-nan -nan nan nan}");
+#endif
   // +/-Inf.
   TestDump(std::vector<uint16_t>{0xfc00, 0x7c00},
            lldb::Format::eFormatVectorOfFloat16, "{-inf inf}");