diff --git a/meta/recipes-devtools/flex/flex/disable-tests.patch b/meta/recipes-devtools/flex/flex/disable-tests.patch
deleted file mode 100644
index 4dc801d72c..0000000000
--- a/meta/recipes-devtools/flex/flex/disable-tests.patch
+++ /dev/null
@@ -1,19 +0,0 @@
-Due to automake stupidity the Makefile in tests/ has an 'all' target that
-depends on $(BUILD_SOURCES), which means when building flex parts of the test
-suite are built even if they're not needed, resulting in flex needing
-flex-native and bison-native to build.
-
-This patch removes the tests directory from SUBDIRS and will be conditionally
-applied by the recipe.
-
-Upstream-Status: Inappropriate
-Signed-off-by: Ross Burton <ross.burton@intel.com>
-
-diff --git a/Makefile.am b/Makefile.am
-index 076ccad..0574d7b 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -55,3 +55,2 @@ SUBDIRS = \
- 	po \
--	tests \
- 	tools
diff --git a/meta/recipes-devtools/flex/flex_2.6.4.bb b/meta/recipes-devtools/flex/flex_2.6.4.bb
index 2236b2bc6a..434ce47c03 100644
--- a/meta/recipes-devtools/flex/flex_2.6.4.bb
+++ b/meta/recipes-devtools/flex/flex_2.6.4.bb
@@ -15,7 +15,6 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=e4742cf92e89040b39486a6219b68067 \
 SRC_URI = "${GITHUB_BASE_URI}/download/v${PV}/flex-${PV}.tar.gz \
            file://run-ptest \
            file://0001-tests-add-a-target-for-building-tests-without-runnin.patch \
-           ${@bb.utils.contains('PTEST_ENABLED', '1', '', 'file://disable-tests.patch', d)} \
            file://0001-build-AC_USE_SYSTEM_EXTENSIONS-in-configure.ac.patch \
            file://check-funcs.patch \
            file://0001-Emit-no-line-directives-if-gen_line_dirs-is-false.patch \