diff --git a/poky/meta/recipes-devtools/python/python/run-ptest b/poky/meta/recipes-devtools/python/python/run-ptest
index 13dfc99..c7002a4 100644
--- a/poky/meta/recipes-devtools/python/python/run-ptest
+++ b/poky/meta/recipes-devtools/python/python/run-ptest
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-python -mtest -W | sed -e '/\.\.\. ok/ s/^/PASS: /g' -e '/\.\.\. [ERROR|FAIL]/ s/^/FAIL: /g' -e '/\.\.\. skipped/ s/^/SKIP: /g' -e 's/ \.\.\. ok//g' -e 's/ \.\.\. ERROR//g' -e 's/ \.\.\. FAIL//g' -e 's/ \.\.\. skipped//g'
+python -mtest -W | sed -u -e '/\.\.\. ok/ s/^/PASS: /g' -e '/\.\.\. [ERROR|FAIL]/ s/^/FAIL: /g' -e '/\.\.\. skipped/ s/^/SKIP: /g' -e 's/ \.\.\. ok//g' -e 's/ \.\.\. ERROR//g' -e 's/ \.\.\. FAIL//g' -e 's/ \.\.\. skipped//g'
diff --git a/poky/meta/recipes-devtools/python/python3/run-ptest b/poky/meta/recipes-devtools/python/python3/run-ptest
index 20c9274..50f9291 100644
--- a/poky/meta/recipes-devtools/python/python3/run-ptest
+++ b/poky/meta/recipes-devtools/python/python3/run-ptest
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-python3 -m test -W | sed -e '/\.\.\. ok/ s/^/PASS: /g' -e '/\.\.\. [ERROR|FAIL]/ s/^/FAIL: /g' -e '/\.\.\. skipped/ s/^/SKIP: /g' -e 's/ \.\.\. ok//g' -e 's/ \.\.\. ERROR//g' -e 's/ \.\.\. FAIL//g' -e 's/ \.\.\. skipped//g'
+python3 -m test -W | sed -u -e '/\.\.\. ok/ s/^/PASS: /g' -e '/\.\.\. [ERROR|FAIL]/ s/^/FAIL: /g' -e '/\.\.\. skipped/ s/^/SKIP: /g' -e 's/ \.\.\. ok//g' -e 's/ \.\.\. ERROR//g' -e 's/ \.\.\. FAIL//g' -e 's/ \.\.\. skipped//g'
diff --git a/poky/meta/recipes-devtools/python/python3_3.7.2.bb b/poky/meta/recipes-devtools/python/python3_3.7.2.bb
index 5c64bc8..28f128d 100644
--- a/poky/meta/recipes-devtools/python/python3_3.7.2.bb
+++ b/poky/meta/recipes-devtools/python/python3_3.7.2.bb
@@ -284,7 +284,7 @@
 PACKAGES += "${PN}-man"
 FILES_${PN}-man = "${datadir}/man"
 
-RDEPENDS_${PN}-ptest = "${PN}-modules ${PN}-tests unzip bzip2 libgcc tzdata-europe coreutils"
+RDEPENDS_${PN}-ptest = "${PN}-modules ${PN}-tests unzip bzip2 libgcc tzdata-europe coreutils sed"
 RDEPENDS_${PN}-tkinter += "${@bb.utils.contains('PACKAGECONFIG', 'tk', 'tk', '', d)}"
 RDEPENDS_${PN}-dev = ""
 
diff --git a/poky/meta/recipes-devtools/python/python_2.7.15.bb b/poky/meta/recipes-devtools/python/python_2.7.15.bb
index c459af0..62051a2 100644
--- a/poky/meta/recipes-devtools/python/python_2.7.15.bb
+++ b/poky/meta/recipes-devtools/python/python_2.7.15.bb
@@ -176,7 +176,7 @@
 RDEPENDS_${PN}-modules += "${PN}-misc"
 
 # ptest
-RDEPENDS_${PN}-ptest = "${PN}-modules ${PN}-tests unzip tzdata-europe coreutils"
+RDEPENDS_${PN}-ptest = "${PN}-modules ${PN}-tests unzip tzdata-europe coreutils sed"
 RDEPENDS_${PN}-tkinter += "${@bb.utils.contains('PACKAGECONFIG', 'tk', 'tk', '', d)}"
 # catch manpage
 PACKAGES += "${PN}-man"