diff --git a/LibOS/shim/test/apps/lmbench/Makefile.lmbench b/LibOS/shim/test/apps/lmbench/Makefile.lmbench
index 24034b4b..5db8db53 100644
--- a/LibOS/shim/test/apps/lmbench/Makefile.lmbench
+++ b/LibOS/shim/test/apps/lmbench/Makefile.lmbench
@@ -4,7 +4,8 @@ lmbench_tests = lat_syscall lat_connect lat_fcntl \
 		lat_tcp lat_udp lat_unix_connect lat_pagefault \
 		bw_tcp bw_mem bw_unix lat_proc lat_ctx lat_rpc \
 		lat_unix lat_sig lat_http lat_pipe \
-		bw_pipe bw_file_rd bw_mmap_rd lmhttp lmdd sh.manifest
+		bw_pipe bw_file_rd bw_mmap_rd lmhttp lmdd \
+		sh.manifest hello.manifest
 
 exec_target = $(lmbench_tests)
 target = $(manifests)
diff --git a/LibOS/shim/test/apps/python/Makefile b/LibOS/shim/test/apps/python/Makefile
index 39b658c8..1331d7b3 100644
--- a/LibOS/shim/test/apps/python/Makefile
+++ b/LibOS/shim/test/apps/python/Makefile
@@ -26,6 +26,29 @@ $(PYTHON_SRC)/configure: $(PYTHON_SRC).tgz
 benchmarks: benchmarks.tar.gz
 	tar -xzf $<
 
+regression:
+	@echo "\n\nBuilding Python..."
+	@$(MAKE) >> /dev/null 2>&1
+
+	@echo "\n\nRun helloworld.py:"
+	./python.manifest scripts/helloworld.py > OUTPUT
+	grep -q "Hello World" OUTPUT
+	@rm OUTPUT
+
+	@echo "\n\nRun fibonacci.py:"
+	./python.manifest scripts/fibonacci.py  > OUTPUT
+	grep -q "fib2              55" OUTPUT
+	@rm OUTPUT
+
+	@echo "\n\nRun test-http.py:"
+	./python.manifest scripts/test-http.py  > OUTPUT
+	wget -q http://google.com/ -O OUTPUT2
+	@DS=`sdiff -B -b -s OUTPUT OUTPUT2 | wc -c`; \
+	TS=`stat -c%s OUTPUT2`; \
+	awk "BEGIN{ percentage = 100.0 * $$DS / $$TS; printf(\"%.3f%% is different\\n\", percentage); if (percentage > 10.0) { exit 1; }}"
+	@rm OUTPUT OUTPUT2
+
+
 BENCHMARK = all,-rietveld,-spitfire,-tornado_http
 
 clean-tmp: