diff --git a/meta-openembedded/meta-python/recipes-devtools/python/python-pycryptodome.inc b/meta-openembedded/meta-python/recipes-devtools/python/python-pycryptodome.inc
index 31d1368..63b4a4a 100644
--- a/meta-openembedded/meta-python/recipes-devtools/python/python-pycryptodome.inc
+++ b/meta-openembedded/meta-python/recipes-devtools/python/python-pycryptodome.inc
@@ -21,7 +21,7 @@
 
 PACKAGES =+ "${PN}-tests"
 
-FILES_${PN}-tests += " \
+FILES_${PN}-tests = " \
     ${PYTHON_SITEPACKAGES_DIR}/Crypto/SelfTest/ \
     ${PYTHON_SITEPACKAGES_DIR}/Crypto/SelfTest/__pycache__/ \
 "