diff --git a/IGC/Compiler/CISACodeGen/EmitVISAPass.cpp b/IGC/Compiler/CISACodeGen/EmitVISAPass.cpp
index 02e4bea70c36..2872a9dea72f 100644
--- a/IGC/Compiler/CISACodeGen/EmitVISAPass.cpp
+++ b/IGC/Compiler/CISACodeGen/EmitVISAPass.cpp
@@ -18352,17 +18352,20 @@ void EmitPass::emitUniformVectorCopy(CVariable* Dst, CVariable* Src, uint32_t nE
         return true;
     };
 
+    // True, allow simd32/simd16; otherwise, no simd32/simd16.
+    const bool allowLargerSIMDSize = false;
+
     // Start with the max execution size that is legal for the vector element
     // and is no greater than the current simdsize.
     uint32_t maxNumElts = (2 * getGRFSize()) / Dst->GetElemSize();
     uint32_t maxSimd = std::min(width, (uint32_t)PowerOf2Floor(maxNumElts));
-    if (maxSimd == 32 && IGC_IS_FLAG_ENABLED(EnableTestVecCopy)) {
+    if (maxSimd == 32 && allowLargerSIMDSize) {
         while (partialCopy(SIMDMode::SIMD32))
             ;
         partialCopy(SIMDMode::SIMD16);
         partialCopy(SIMDMode::SIMD8);
     }
-    else if (maxSimd == 16 && IGC_IS_FLAG_ENABLED(EnableTestVecCopy)) {
+    else if (maxSimd == 16 && allowLargerSIMDSize) {
         while (partialCopy(SIMDMode::SIMD16))
             ;
         partialCopy(SIMDMode::SIMD8);
diff --git a/IGC/common/igc_flags.h b/IGC/common/igc_flags.h
index 9e2867bf0e97..99d475e4915b 100644
--- a/IGC/common/igc_flags.h
+++ b/IGC/common/igc_flags.h
@@ -394,7 +394,6 @@ DECLARE_IGC_REGKEY(bool, PrintDebugSettings,            false, "Prints all non-d
 DECLARE_IGC_REGKEY(bool, UseMTInLLD,                    false, "Use multi-threading when linking multiple elf files", true)
 DECLARE_IGC_REGKEY(bool, NoCatchAllDebugLine,           false, "Don't emit special placeholder instruction to map VISA orphan instructions", false)
 DECLARE_IGC_REGKEY(bool, EnableTestSplitI64,            false, "Test legalization that split i64 store unnecessarily, to be deleted once test is done[temp]", true)
-DECLARE_IGC_REGKEY(bool, EnableTestVecCopy,             true,  "Test uniform vector copy that starts from simd32, to be deleted once test is done[temp]", true)
 DECLARE_IGC_REGKEY(bool, ShaderDumpTranslationOnly,     false, "Dump LLVM IR right after translation from SPIRV to stderr and ignore all passes", false)
 DECLARE_IGC_REGKEY(bool, UseVMaskPredicate,             false, "Use VMask as predicate for subspan usage", false)
 DECLARE_IGC_REGKEY(DWORD, VMaskPredDebug,               2,     "Debug only; 0 - No VMaskPred; 1 - createVMaskPred; 2 - createVMaskPred and UseVMaskPred", false)