diff --git a/lib/Interpreter/CMakeLists.txt b/lib/Interpreter/CMakeLists.txt
index 19e3c4cbf..fcc3d68a2 100644
--- a/lib/Interpreter/CMakeLists.txt
+++ b/lib/Interpreter/CMakeLists.txt
@@ -36,6 +36,7 @@ target_link_libraries(clangCppInterOp PRIVATE
   ${cling_clang_interp}
   clangAST
   clangBasic
+  clangFrontend
   clangLex
   clangSema
   dl
@@ -45,4 +46,3 @@ string(REPLACE ";" "\;" _VER CPPINTEROP_VERSION)
 set_source_files_properties(CppInterOp.cpp PROPERTIES COMPILE_DEFINITIONS
   "LLVM_BINARY_DIR=\"${LLVM_BINARY_DIR}\";CPPINTEROP_VERSION=\"${_VAR}\""
 )
-
diff --git a/lib/Interpreter/DynamicLibraryManager.cpp b/lib/Interpreter/DynamicLibraryManager.cpp
index 28ae99856..b5a65c0f8 100644
--- a/lib/Interpreter/DynamicLibraryManager.cpp
+++ b/lib/Interpreter/DynamicLibraryManager.cpp
@@ -286,8 +286,10 @@ namespace Cpp {
     if (llvm::sys::path::is_absolute(libStem)) {
       if (isSharedLibrary(libStem))
         return normalizePath(libStem);
-      else
-        return std::string();
+
+      LLVM_DEBUG(dbgs() << "Dyld::lookupLibrary: '" << libStem.str() << "'"
+                        << "is not a shared library\n");
+      return std::string();
     }
 
     // Subst all known linker variables ($origin, @rpath, etc.)
diff --git a/unittests/CppInterOp/CMakeLists.txt b/unittests/CppInterOp/CMakeLists.txt
index 08cd4ee9a..7ca5e5dfa 100644
--- a/unittests/CppInterOp/CMakeLists.txt
+++ b/unittests/CppInterOp/CMakeLists.txt
@@ -19,3 +19,15 @@ target_link_libraries(CppInterOpTests
   )
 
 export_executable_symbols(CppInterOpTests)
+
+unset(LLVM_LINK_COMPONENTS)
+
+add_cppinterop_unittest(DynamicLibraryManagerTests DynamicLibraryManagerTest.cpp)
+target_link_libraries(DynamicLibraryManagerTests
+  PRIVATE
+  clangCppInterOp
+  )
+
+add_dependencies(DynamicLibraryManagerTests TestSharedLib)
+#export_executable_symbols_for_plugins(TestSharedLib)
+add_subdirectory(TestSharedLib)
diff --git a/unittests/CppInterOp/DynamicLibraryManagerTest.cpp b/unittests/CppInterOp/DynamicLibraryManagerTest.cpp
new file mode 100644
index 000000000..c7dea4c2f
--- /dev/null
+++ b/unittests/CppInterOp/DynamicLibraryManagerTest.cpp
@@ -0,0 +1,8 @@
+#include "gtest/gtest.h"
+
+#include "clang/Interpreter/CppInterOp.h"
+
+TEST(DynamicLibraryManagerTest, Sanity) {
+  EXPECT_TRUE(Cpp::CreateInterpreter());
+  EXPECT_TRUE(Cpp::LoadLibrary("TestSharedLib"));
+}
diff --git a/unittests/CppInterOp/TestSharedLib/CMakeLists.txt b/unittests/CppInterOp/TestSharedLib/CMakeLists.txt
new file mode 100644
index 000000000..0111ea0f3
--- /dev/null
+++ b/unittests/CppInterOp/TestSharedLib/CMakeLists.txt
@@ -0,0 +1,7 @@
+add_llvm_library(TestSharedLib SHARED BUILDTREE_ONLY TestSharedLib.cpp)
+# Put TestSharedLib next to the unit test executable.
+set_output_directory(TestSharedLib
+  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/../
+  LIBRARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/../
+  )
+set_target_properties(TestSharedLib PROPERTIES FOLDER "Tests")
diff --git a/unittests/CppInterOp/TestSharedLib/TestSharedLib.cpp b/unittests/CppInterOp/TestSharedLib/TestSharedLib.cpp
new file mode 100644
index 000000000..c0d7c474c
--- /dev/null
+++ b/unittests/CppInterOp/TestSharedLib/TestSharedLib.cpp
@@ -0,0 +1,3 @@
+#include "TestSharedLib.h"
+
+int ret_zero() { return 0; }
diff --git a/unittests/CppInterOp/TestSharedLib/TestSharedLib.h b/unittests/CppInterOp/TestSharedLib/TestSharedLib.h
new file mode 100644
index 000000000..9577f66d6
--- /dev/null
+++ b/unittests/CppInterOp/TestSharedLib/TestSharedLib.h
@@ -0,0 +1,6 @@
+#ifndef UNITTESTS_CPPINTEROP_TESTSHAREDLIB_TESTSHAREDLIB_H
+#define UNITTESTS_CPPINTEROP_TESTSHAREDLIB_TESTSHAREDLIB_H
+
+int ret_zero();
+
+#endif // UNITTESTS_CPPINTEROP_TESTSHAREDLIB_TESTSHAREDLIB_H