diff --git a/regression/cbmc/Malloc23/test.desc b/regression/cbmc/Malloc23/test.desc
index 9e34fa7f42..4bd6cbdc14 100644
--- a/regression/cbmc/Malloc23/test.desc
+++ b/regression/cbmc/Malloc23/test.desc
@@ -5,8 +5,8 @@ main.c
 ^SIGNAL=0$
 pointer outside dynamic object bounds in \*p: FAILURE
 pointer outside dynamic object bounds in \*p: FAILURE
-pointer outside dynamic object bounds in p2\[\(signed long int\)1\]: FAILURE
-pointer outside dynamic object bounds in p2\[\(signed long int\)0\]: FAILURE
+pointer outside dynamic object bounds in p2\[.*1\]: FAILURE
+pointer outside dynamic object bounds in p2\[.*0\]: FAILURE
 \*\* 4 of 36 failed \(3 iterations\)
 --
 ^warning: ignoring
diff --git a/regression/cbmc/byte_update2/main.c b/regression/cbmc/byte_update2/main.c
index 12493e4267..cee6e19ecc 100644
--- a/regression/cbmc/byte_update2/main.c
+++ b/regression/cbmc/byte_update2/main.c
@@ -6,7 +6,7 @@ int main(int argc, char** argv) {
   if(argc != 2)
     return 0;
 
-  unsigned long x[argc];
+  unsigned long long x[argc];
   x[0]=0x0102030405060708;
   x[1]=0x1112131415161718;
 
diff --git a/regression/cbmc/byte_update3/main.c b/regression/cbmc/byte_update3/main.c
index 6d9b3c293c..e20eb6588c 100644
--- a/regression/cbmc/byte_update3/main.c
+++ b/regression/cbmc/byte_update3/main.c
@@ -13,7 +13,7 @@ int main(int argc, char** argv) {
   x[3]=0x0708;
   x[4]=0x090a;
 
-  unsigned long* alias=(unsigned long*)(((char*)x)+0);
+  unsigned long long* alias=(unsigned long long*)(((char*)x)+0);
   *alias=0xf1f2f3f4f5f6f7f8;
 
   unsigned char* alias2=(unsigned char*)x;
diff --git a/regression/cbmc/byte_update4/main.c b/regression/cbmc/byte_update4/main.c
index 0285f3058f..2866b20a0f 100644
--- a/regression/cbmc/byte_update4/main.c
+++ b/regression/cbmc/byte_update4/main.c
@@ -18,7 +18,7 @@ int main(int argc, char** argv) {
   x[8]=0x09;
   x[9]=0x0a;
 
-  unsigned long* alias=(unsigned long*)(((char*)x)+1);
+  unsigned long long* alias=(unsigned long long*)(((char*)x)+1);
   *alias=0xf1f2f3f4f5f6f7f8;
 
   unsigned char* alias2=(unsigned char*)x;
diff --git a/regression/cbmc/byte_update5/main.c b/regression/cbmc/byte_update5/main.c
index e2f9da4def..fc698a2014 100644
--- a/regression/cbmc/byte_update5/main.c
+++ b/regression/cbmc/byte_update5/main.c
@@ -13,7 +13,7 @@ int main(int argc, char** argv) {
   x[3]=0x0708;
   x[4]=0x090a;
 
-  unsigned long* alias=(unsigned long*)(((char*)x)+1);
+  unsigned long long* alias=(unsigned long long*)(((char*)x)+1);
   *alias=0xf1f2f3f4f5f6f7f8;
 
   unsigned char* alias2=(unsigned char*)x;
diff --git a/regression/cbmc/byte_update6/main.c b/regression/cbmc/byte_update6/main.c
index cb92364572..d0e3680b83 100644
--- a/regression/cbmc/byte_update6/main.c
+++ b/regression/cbmc/byte_update6/main.c
@@ -6,7 +6,7 @@ int main(int argc, char** argv) {
   if(argc != 2)
     return 0;
 
-  unsigned long x[argc];
+  unsigned long long x[argc];
   x[0]=0x0102030405060708;
   x[1]=0x1112131415161718;
 
diff --git a/regression/cbmc/byte_update7/main.c b/regression/cbmc/byte_update7/main.c
index 599df60afd..35690acc90 100644
--- a/regression/cbmc/byte_update7/main.c
+++ b/regression/cbmc/byte_update7/main.c
@@ -6,7 +6,7 @@ int main(int argc, char** argv) {
   if(argc != 2)
     return 0;
 
-  unsigned long x[argc];
+  unsigned long long x[argc];
   x[0]=0x0102030405060708;
   x[1]=0x1112131415161718;