diff --git a/Makefile.buildtests b/Makefile.buildtests
index 06f34bc03..ed04493e9 100644
--- a/Makefile.buildtests
+++ b/Makefile.buildtests
@@ -48,6 +48,9 @@ buildtest:
 					HOME=$${HOME} \
 					PATH=$${PATH} \
 					BOARD=$${BOARD} \
+					CCACHE=$${CCACHE} \
+					CCACHE_DIR=$${CCACHE_DIR} \
+					CCACHE_BASEDIR=$${CCACHE_BASEDIR} \
 					RIOTBASE=$${RIOTBASE} \
 					RIOTBOARD=$${RIOTBOARD} \
 					RIOTCPU=$${RIOTCPU} \