diff --git a/contrib/netbsd-tests/usr.bin/grep/t_grep.sh b/contrib/netbsd-tests/usr.bin/grep/t_grep.sh
index 596b70f4d48a..6c221ebb0dba 100755
--- a/contrib/netbsd-tests/usr.bin/grep/t_grep.sh
+++ b/contrib/netbsd-tests/usr.bin/grep/t_grep.sh
@@ -646,30 +646,6 @@ mmap_body()
 	atf_check -s exit:1 grep --mmap -e "Z" test1
 }
 
-atf_test_case mmap_eof_not_eol
-mmap_eof_not_eol_head()
-{
-	atf_set "descr" "Check --mmap flag handling of encountering EOF without EOL (PR 165471, 219402)"
-}
-mmap_eof_not_eol_body()
-{
-	grep_type
-	if [ $? -eq $GREP_TYPE_GNU ]; then
-		atf_expect_fail "gnu grep from ports has no --mmap option"
-	fi
-
-	atf_expect_fail "relies on jemalloc feature no longer available; needs to be rewritten - bug 220309"
-
-	printf "ABC" > test1
-	jot -b " "  -s "" 4096 >> test2
-
-	atf_check -s exit:0 -o inline:"B\n" grep --mmap -oe "B" test1
-	# Dependency on jemalloc(3) to detect buffer overflow, otherwise this
-	# unreliably produces a SIGSEGV or SIGBUS
-	atf_check -s exit:0 -o not-empty \
-	    env MALLOC_CONF="redzone:true" grep --mmap -e " " test2
-}
-
 atf_test_case matchall
 matchall_head()
 {
@@ -779,7 +755,6 @@ atf_init_test_cases()
 	atf_add_test_case binary_flags
 	atf_add_test_case badcontext
 	atf_add_test_case mmap
-	atf_add_test_case mmap_eof_not_eol
 	atf_add_test_case matchall
 	atf_add_test_case fgrep_multipattern
 	atf_add_test_case fgrep_icase