diff --git a/minimal-examples/http-client/minimal-http-client-multi/CMakeLists.txt b/minimal-examples/http-client/minimal-http-client-multi/CMakeLists.txt
index 2544b6e94..9122a9e4c 100644
--- a/minimal-examples/http-client/minimal-http-client-multi/CMakeLists.txt
+++ b/minimal-examples/http-client/minimal-http-client-multi/CMakeLists.txt
@@ -9,10 +9,13 @@ set(SAMP lws-minimal-http-client-multi)
 set(SRCS minimal-http-client-multi.c)
 
 set(requirements 1)
+set(MBEDTLS 0)
 require_lws_config(LWS_ROLE_H1 1 requirements)
 require_lws_config(LWS_WITH_CLIENT 1 requirements)
 require_lws_config(LWS_WITH_TLS 1 requirements)
 
+require_lws_config(LWS_WITH_MBEDTLS 1 MBEDTLS)
+
 
 if (requirements)
 	add_executable(${SAMP} ${SRCS})
@@ -51,7 +54,10 @@ if (WIN32)
 	add_test(NAME st_hcmp_srv COMMAND cmd.exe /c start /b $<TARGET_FILE:test-server> -s --port 1${PORT_HCM_SRV})
 	add_test(NAME ki_hcmp_srv COMMAND taskkill /F /IM $<TARGET_FILE_NAME:test-server> /T)
 else()
-	if (VALGRIND)
+	#
+	# mbedtls is too slow to keep up on some targets, when ctest is in parallel
+	#
+	if (VALGRIND AND NOT MBEDTLS)
 		add_test(NAME st_hcm_srv COMMAND
 			${CMAKE_SOURCE_DIR}/scripts/ctest-background.sh
 				hcm_srv ${VALGRIND} --tool=memcheck $<TARGET_FILE:lws-minimal-http-server-tls>
diff --git a/minimal-examples/http-client/minimal-http-client-post/CMakeLists.txt b/minimal-examples/http-client/minimal-http-client-post/CMakeLists.txt
index f67ef8ef0..b4e4b74c2 100644
--- a/minimal-examples/http-client/minimal-http-client-post/CMakeLists.txt
+++ b/minimal-examples/http-client/minimal-http-client-post/CMakeLists.txt
@@ -9,9 +9,12 @@ set(SAMP lws-minimal-http-client-post)
 set(SRCS minimal-http-client-post.c)
 
 set(requirements 1)
+set(MBEDTLS 0)
 require_lws_config(LWS_ROLE_H1 1 requirements)
 require_lws_config(LWS_WITH_CLIENT 1 requirements)
 
+require_lws_config(LWS_WITH_MBEDTLS 1 MBEDTLS)
+
 if (requirements)
 	add_executable(${SAMP} ${SRCS})
 	find_program(VALGRIND "valgrind")
@@ -45,7 +48,10 @@ if (WIN32)
 	add_test(NAME st_hcp_srv COMMAND cmd.exe /c start /b $<TARGET_FILE:test-server> -s --port ${PORT_HCP_SRV})
 	add_test(NAME ki_hcp_srv COMMAND taskkill /F /IM $<TARGET_FILE_NAME:test-server> /T)
 else()
-	if (VALGRIND)
+	#
+	# mbedtls is too slow to keep up on some targets, when ctest is in parallel
+	#
+	if (VALGRIND AND NOT MBEDTLS)
 		add_test(NAME st_hcp_srv COMMAND
 			${CMAKE_SOURCE_DIR}/scripts/ctest-background.sh
 					hcp_srv ${VALGRIND} --tool=memcheck