diff --git a/src/common/test.h b/src/common/test.h
index 21e5caf..418eae1 100644
--- a/src/common/test.h
+++ b/src/common/test.h
@@ -11,6 +11,7 @@ extern volatile int t_status;
 int t_printf(const char *s, ...);
 
 int t_vmfill(void **, size_t *, int);
+int t_memfill(void);
 
 void t_fdfill(void);
 
diff --git a/src/regression/malloc-oom.c b/src/regression/malloc-oom.c
index 4e40ccd..d9a1f6e 100644
--- a/src/regression/malloc-oom.c
+++ b/src/regression/malloc-oom.c
@@ -6,8 +6,8 @@
 
 int main(void)
 {
-	if (t_vmfill(0,0,0) < 0)
-		t_error("vmfill failed: %s\n", strerror(errno));
+	if (t_memfill() < 0)
+		t_error("memfill failed\n");
 
 	errno = 0;
 	if (malloc(50000))
diff --git a/src/regression/pthread_create-oom.c b/src/regression/pthread_create-oom.c
index e8d8169..c52a914 100644
--- a/src/regression/pthread_create-oom.c
+++ b/src/regression/pthread_create-oom.c
@@ -15,11 +15,8 @@ int main(void)
 	pthread_t td;
 	int r, arg;
 
-	r = t_vmfill(0, 0, 0);
-	if (r <= 0) {
-		t_error("fatal: vmfill has failed\n");
-		return 1;
-	}
+	if (t_memfill() < 0)
+		t_error("memfill failed\n");
 	r = pthread_create(&td, 0, start, &arg);
 	if (r == 0)
 		t_error("pthread_create succeeded\n");
diff --git a/src/regression/setenv-oom.c b/src/regression/setenv-oom.c
index d7e6162..6780310 100644
--- a/src/regression/setenv-oom.c
+++ b/src/regression/setenv-oom.c
@@ -1,6 +1,7 @@
 // commit 543787039098c121917cb5f3e129d84b61afa61b 2013-10-04
 // setenv should not crash on oom
 #include <stdlib.h>
+#include <sys/resource.h>
 #include <string.h>
 #include <errno.h>
 #include "test.h"
@@ -9,8 +10,8 @@ int main(void)
 {
 	char buf[10000];
 
-	if (t_vmfill(0,0,0) < 0)
-		t_error("vmfill failed: %s\n", strerror(errno));
+	if (t_memfill() < 0)
+		t_error("memfill failed\n");
 
 	memset(buf, 'x', sizeof buf);
 	buf[sizeof buf - 1] = 0;