diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index bddd6a1e8..a70c6ab92 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -42,11 +42,6 @@ FUNCTION(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
     ENDIF(NOT CMAKE_${lang}_COMPILER_ID)
   ENDFOREACH(flags)
 
-  # If the compiler is still unknown, try to query its vendor.
-  IF(NOT CMAKE_${lang}_COMPILER_ID)
-    CMAKE_DETERMINE_COMPILER_ID_VENDOR(${lang})
-  ENDIF()
-
   # if the format is unknown after all files have been checked, put "Unknown" in the cache
   IF(NOT CMAKE_EXECUTABLE_FORMAT)
     SET(CMAKE_EXECUTABLE_FORMAT "Unknown" CACHE INTERNAL "Executable file format")
@@ -250,38 +245,3 @@ FUNCTION(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
     PARENT_SCOPE)
   SET(CMAKE_EXECUTABLE_FORMAT "${CMAKE_EXECUTABLE_FORMAT}" PARENT_SCOPE)
 ENDFUNCTION(CMAKE_DETERMINE_COMPILER_ID_CHECK lang)
-
-#-----------------------------------------------------------------------------
-# Function to query the compiler vendor.
-# This uses a table with entries of the form
-#   list(APPEND CMAKE_${lang}_COMPILER_ID_VENDORS ${vendor})
-#   set(CMAKE_${lang}_COMPILER_ID_VENDOR_FLAGS_${vendor} -some-vendor-flag)
-#   set(CMAKE_${lang}_COMPILER_ID_VENDOR_REGEX_${vendor} "Some Vendor Output")
-# We try running the compiler with the flag for each vendor and
-# matching its regular expression in the output.
-FUNCTION(CMAKE_DETERMINE_COMPILER_ID_VENDOR lang)
-  FOREACH(vendor ${CMAKE_${lang}_COMPILER_ID_VENDORS})
-    SET(flags ${CMAKE_${lang}_COMPILER_ID_VENDOR_FLAGS_${vendor}})
-    SET(regex ${CMAKE_${lang}_COMPILER_ID_VENDOR_REGEX_${vendor}})
-    EXECUTE_PROCESS(
-      COMMAND ${CMAKE_${lang}_COMPILER}
-      ${CMAKE_${lang}_COMPILER_ID_ARG1}
-      ${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
-      ${flags}
-      WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
-      OUTPUT_VARIABLE output ERROR_VARIABLE output
-      RESULT_VARIABLE result
-      )
-    IF("${output}" MATCHES "${regex}")
-      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-        "Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
-        "matched \"${regex}\":\n${output}")
-      SET(CMAKE_${lang}_COMPILER_ID "${vendor}" PARENT_SCOPE)
-      BREAK()
-    ELSE()
-      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-        "Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
-        "did not match \"${regex}\":\n${output}")
-    ENDIF()
-  ENDFOREACH()
-ENDFUNCTION(CMAKE_DETERMINE_COMPILER_ID_VENDOR)
diff --git a/Tests/CMakeTests/CMakeLists.txt b/Tests/CMakeTests/CMakeLists.txt
index 6df026e0b..161ca4499 100644
--- a/Tests/CMakeTests/CMakeLists.txt
+++ b/Tests/CMakeTests/CMakeLists.txt
@@ -26,7 +26,6 @@ AddCMakeTest(If "")
 AddCMakeTest(String "")
 AddCMakeTest(Math "")
 AddCMakeTest(CMakeMinimumRequired "")
-AddCMakeTest(CompilerIdVendor "")
 
 if(HAVE_ELF_H)
   AddCMakeTest(ELF "")
diff --git a/Tests/CMakeTests/CompilerIdVendorTest.cmake.in b/Tests/CMakeTests/CompilerIdVendorTest.cmake.in
deleted file mode 100644
index 68f646212..000000000
--- a/Tests/CMakeTests/CompilerIdVendorTest.cmake.in
+++ /dev/null
@@ -1,31 +0,0 @@
-# This is not supposed to be included by user code, but we need to
-# test it.
-include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
-
-set(MY_BINARY_DIR "@CMAKE_CURRENT_BINARY_DIR@/CompilerIdVendor")
-file(REMOVE_RECURSE ${MY_BINARY_DIR})
-file(MAKE_DIRECTORY ${MY_BINARY_DIR})
-
-set(CMAKE_MyLang_COMPILER ${CMAKE_COMMAND})
-set(CMAKE_MyLang_COMPILER_ID_ARG1)
-set(CMAKE_MyLang_COMPILER_ID_FLAGS_LIST)
-set(CMAKE_MyLang_COMPILER_ID_DIR ${MY_BINARY_DIR})
-
-file(WRITE "${MY_BINARY_DIR}/BogusVendor.cmake" "message(\"This is a BogusVendor compiler\")")
-list(APPEND CMAKE_MyLang_COMPILER_ID_VENDORS BogusVendor)
-set(CMAKE_MyLang_COMPILER_ID_VENDOR_FLAGS_BogusVendor -P BogusVendor.cmake)
-set(CMAKE_MyLang_COMPILER_ID_VENDOR_REGEX_BogusVendor ThisDoesNotMatch_BogusVendor)
-
-file(WRITE "${MY_BINARY_DIR}/MyVendor.cmake" "message(\"This is a MyVendor compiler\")")
-list(APPEND CMAKE_MyLang_COMPILER_ID_VENDORS MyVendor)
-set(CMAKE_MyLang_COMPILER_ID_VENDOR_FLAGS_MyVendor -P MyVendor.cmake)
-set(CMAKE_MyLang_COMPILER_ID_VENDOR_REGEX_MyVendor MyVendor)
-
-set(CMAKE_BINARY_DIR ${MY_BINARY_DIR})
-cmake_determine_compiler_id_vendor(MyLang)
-
-if("${CMAKE_MyLang_COMPILER_ID}" STREQUAL "MyVendor")
-  message(STATUS "Found MyVendor compiler id!")
-else()
-  message(FATAL_ERROR "Did not find MyVendor compiler id: [${CMAKE_MyLang_COMPILER_ID}]")
-endif()