diff --git a/regression/cbmc/Typecast2/main.c b/regression/cbmc/Typecast2/main.c
deleted file mode 100644
index 59ea8cb72d0..00000000000
--- a/regression/cbmc/Typecast2/main.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <assert.h>
-
-int main()
-{
-  unsigned int i=2;
-  assert(0l==(signed long int)(i - (unsigned int)2));
-  return 0;
-}
diff --git a/regression/cbmc/Typecast2/main.i b/regression/cbmc/Typecast2/main.i
new file mode 100644
index 00000000000..8dc3ecf5e6a
--- /dev/null
+++ b/regression/cbmc/Typecast2/main.i
@@ -0,0 +1,7 @@
+int main()
+{
+  unsigned int i=2;
+  __CPROVER_assert(0l==(signed long int)(i - (unsigned int)2),
+                   "difference of cast");
+  return 0;
+}
diff --git a/regression/cbmc/Typecast2/test.desc b/regression/cbmc/Typecast2/test.desc
index 1af9f7644e7..cdbe617e1f6 100644
--- a/regression/cbmc/Typecast2/test.desc
+++ b/regression/cbmc/Typecast2/test.desc
@@ -1,5 +1,5 @@
 CORE
-main.c
+main.i
 --no-propagation --64
 ^EXIT=0$
 ^SIGNAL=0$
diff --git a/regression/cbmc/bounds_check1/test.desc b/regression/cbmc/bounds_check1/test.desc
index efec610daee..eed958c1397 100644
--- a/regression/cbmc/bounds_check1/test.desc
+++ b/regression/cbmc/bounds_check1/test.desc
@@ -3,12 +3,12 @@ main.c
 --bounds-check --pointer-check
 ^EXIT=10$
 ^SIGNAL=0$
-\[\(signed long( long)? int\)i2\]: FAILURE
-dest\[\(signed long( long)? int\)j2\]: FAILURE
-payload\[\(signed long( long)? int\)[kl]2\]: FAILURE
+\[\(.*\)i2\]: FAILURE
+dest\[\(.*\)j2\]: FAILURE
+payload\[\(.*\)[kl]2\]: FAILURE
 \*\* 10 of 72 failed
 --
 ^warning: ignoring
-\[\(signed long( long)? int\)i\]: FAILURE
-dest\[\(signed long( long)? int\)j\]: FAILURE
-payload\[\(signed long( long)? int\)[kl]\]: FAILURE
+\[\(.*\)i\]: FAILURE
+dest\[\(.*\)j\]: FAILURE
+payload\[\(.*\)[kl]\]: FAILURE