diff --git a/cddl/usr.sbin/dtrace/tests/common/raise/Makefile b/cddl/usr.sbin/dtrace/tests/common/raise/Makefile
index cde512f2d21f..83af0e40de1f 100644
--- a/cddl/usr.sbin/dtrace/tests/common/raise/Makefile
+++ b/cddl/usr.sbin/dtrace/tests/common/raise/Makefile
@@ -20,4 +20,6 @@ CFILES= \
      tst.raise3.c  \
 
 
+TEST_METADATA.t_dtrace_contrib+=	required_memory="4g"
+
 .include "../../dtrace.test.mk"
diff --git a/cddl/usr.sbin/dtrace/tests/common/safety/Makefile b/cddl/usr.sbin/dtrace/tests/common/safety/Makefile
index 53260533b641..5056260d0621 100644
--- a/cddl/usr.sbin/dtrace/tests/common/safety/Makefile
+++ b/cddl/usr.sbin/dtrace/tests/common/safety/Makefile
@@ -53,4 +53,6 @@ CFILES= \
 
 
 
+TEST_METADATA.t_dtrace_contrib+=	required_memory="4g"
+
 .include "../../dtrace.test.mk"
diff --git a/cddl/usr.sbin/dtrace/tests/tools/genmakefiles.sh b/cddl/usr.sbin/dtrace/tests/tools/genmakefiles.sh
index 9953064bcd3e..4b889442f45b 100755
--- a/cddl/usr.sbin/dtrace/tests/tools/genmakefiles.sh
+++ b/cddl/usr.sbin/dtrace/tests/tools/genmakefiles.sh
@@ -34,15 +34,28 @@ genmakefile()
 
     # One-off variable definitions.
     local special
-    if [ "$basedir" = proc ]; then
+    case "$basedir" in
+    proc)
         special="
 LIBADD.tst.sigwait.exe+= rt
 "
-    elif [ "$basedir" = uctf ]; then
+        ;;
+    raise)
+	special="
+TEST_METADATA.t_dtrace_contrib+=	required_memory=\"4g\"
+"
+        ;;
+    safety)
+	special="
+TEST_METADATA.t_dtrace_contrib+=	required_memory=\"4g\"
+"
+        ;;
+    uctf)
         special="
 WITH_CTF=YES
 "
-    fi
+        ;;
+    esac
 
     local makefile=$(mktemp)
     cat <<__EOF__ > $makefile