diff --git a/mlir/test/CMakeLists.txt b/mlir/test/CMakeLists.txt
--- a/mlir/test/CMakeLists.txt
+++ b/mlir/test/CMakeLists.txt
@@ -173,6 +173,11 @@
   )
 set_target_properties(check-mlir PROPERTIES FOLDER "Tests")
 
-add_lit_testsuites(MLIR ${CMAKE_CURRENT_SOURCE_DIR}
-  DEPENDS ${MLIR_TEST_DEPENDS}
-)
+# In case of standalone builds.
+if (MLIR_STANDALONE_BUILD)
+  add_lit_testsuites(MLIR ${CMAKE_CURRENT_BINARY_DIR}
+    DEPENDS ${MLIR_TEST_DEPENDS})
+else()
+  add_lit_testsuites(MLIR ${CMAKE_CURRENT_SOURCE_DIR}
+    DEPENDS ${MLIR_TEST_DEPENDS})
+endif()