diff --git a/CMakeLists.txt b/CMakeLists.txt
index e5edb22..89e7df8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -218,6 +218,7 @@ if(RDK_BUILD_PYTHON_WRAPPERS)
     if(RDK_INSTALL_PYTHON_TESTS)
       install(DIRECTORY rdkit DESTINATION ${PYTHON_INSTDIR}
         COMPONENT python
+        PATTERN "sping" EXCLUDE
         PATTERN ".svn" EXCLUDE
         PATTERN "CMake*" EXCLUDE
         PATTERN "Basement" EXCLUDE
@@ -225,6 +226,7 @@ if(RDK_BUILD_PYTHON_WRAPPERS)
     else(RDK_INSTALL_PYTHON_TESTS)
       install(DIRECTORY rdkit DESTINATION ${PYTHON_INSTDIR}
         COMPONENT python
+        PATTERN "sping" EXCLUDE
         PATTERN ".svn" EXCLUDE
         PATTERN "test_data" EXCLUDE
         PATTERN "testData" EXCLUDE