diff --git a/Makefile.include b/Makefile.include
index d3b2eb8d7c..065326ff07 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -110,7 +110,7 @@ include $(RIOTMAKE)/info-nproc.inc.mk
 # List of boards variables
 include $(RIOTMAKE)/boards.inc.mk
 
-GLOBAL_GOALS += buildtest info-boards-supported info-boards-features-missing info-buildsizes info-buildsizes-diff
+GLOBAL_GOALS += buildtest buildtest-indocker info-boards-supported info-boards-features-missing info-buildsizes info-buildsizes-diff
 ifneq (, $(filter $(GLOBAL_GOALS), $(MAKECMDGOALS)))
   BOARD=none
 endif
diff --git a/makefiles/buildtests.inc.mk b/makefiles/buildtests.inc.mk
index f980630289..0f9a65b052 100644
--- a/makefiles/buildtests.inc.mk
+++ b/makefiles/buildtests.inc.mk
@@ -1,10 +1,7 @@
-.PHONY: buildtest
+.PHONY: buildtest buildtest-indocker
 
 BUILDTEST_MAKE_REDIRECT ?= >/dev/null 2>&1
 
-ifeq ($(BUILD_IN_DOCKER),1)
-buildtest: ..in-docker-container
-else
 buildtest:
 	@ \
 	RESULT=true ; \
@@ -24,4 +21,17 @@ buildtest:
 		fi; \
 	done ; \
 	$${RESULT}
+
+# Define 'buildtest-indocker' completely executed inside the container.
+# It prevents starting one container per compilation wich is slower but it
+# could hide errors where the host toolchain would be used
+ifeq ($(BUILD_IN_DOCKER),1)
+  buildtest-indocker: ..in-docker-container
+else
+ifeq ($(INSIDE_DOCKER),1)
+  buildtest-indocker: buildtest
+else
+  buildtest-indocker:
+	$(error $@ must be run with `BUILD_IN_DOCKER=1`)
+endif # INSIDE_DOCKER
 endif # BUILD_IN_DOCKER
diff --git a/makefiles/docker.inc.mk b/makefiles/docker.inc.mk
index d7249b5f53..c620437aaf 100644
--- a/makefiles/docker.inc.mk
+++ b/makefiles/docker.inc.mk
@@ -5,7 +5,7 @@ export DOCKER_FLAGS ?= --rm
 # List of Docker-enabled make goals
 export DOCKER_MAKECMDGOALS_POSSIBLE = \
   all \
-  buildtest \
+  buildtest-indocker \
   scan-build \
   scan-build-analyze \
   tests-% \