diff --git a/exporters/otlp/CMakeLists.txt b/exporters/otlp/CMakeLists.txt
index 1bc3a78939..1f3dec6dd0 100644
--- a/exporters/otlp/CMakeLists.txt
+++ b/exporters/otlp/CMakeLists.txt
@@ -37,12 +37,13 @@ if(BUILD_TESTING)
     TEST_LIST recordable_test)
   if(MSVC)
     add_definitions(-DGTEST_LINKED_AS_SHARED_LIBRARY=1)
-  endif()
-  if(GMOCK_LIB)
-    # unset GMOCK_LIB to force find_library to redo the lookup, as the cached
-    # entry could cause linking to incorrect flavor of gmock and leading to
-    # runtime error.
-    unset(GMOCK_LIB CACHE)
+  else()
+    if(GMOCK_LIB)
+      # unset GMOCK_LIB to force find_library to redo the lookup, as the cached
+      # entry could cause linking to incorrect flavor of gmock and leading to
+      # runtime error.
+      unset(GMOCK_LIB CACHE)
+    endif()
   endif()
   if(MSVC AND CMAKE_BUILD_TYPE STREQUAL "Debug")
     find_library(GMOCK_LIB gmockd PATH_SUFFIXES lib)