diff --git a/contrib/pjdfstest/tests/open/20.t b/contrib/pjdfstest/tests/open/20.t
index de80b6122b7..7b94b036ab5 100644
--- a/contrib/pjdfstest/tests/open/20.t
+++ b/contrib/pjdfstest/tests/open/20.t
@@ -14,7 +14,11 @@ n0=`namegen`
 
 cp -pf `which sleep` ${n0}
 ./${n0} 3 &
+while ! pkill -0 -f ./${n0}; do
+	sleep 0.1
+done
 expect ETXTBSY open ${n0} O_WRONLY
 expect ETXTBSY open ${n0} O_RDWR
 expect ETXTBSY open ${n0} O_RDONLY,O_TRUNC
+pkill -9 -f ./${n0}
 expect 0 unlink ${n0}
diff --git a/contrib/pjdfstest/tests/truncate/11.t b/contrib/pjdfstest/tests/truncate/11.t
index b00d7b89c16..f4ecb42d2f0 100644
--- a/contrib/pjdfstest/tests/truncate/11.t
+++ b/contrib/pjdfstest/tests/truncate/11.t
@@ -14,5 +14,9 @@ n0=`namegen`
 
 cp -pf `which sleep` ${n0}
 ./${n0} 3 &
+while ! pkill -0 -f ./${n0}; do
+	sleep 0.1
+done
 expect ETXTBSY truncate ${n0} 123
+pkill -9 -f ./${n0}
 expect 0 unlink ${n0}