diff --git a/test/7.3.4.fs b/test/7.3.4.fs
index db2a302..b4dedf0 100644
--- a/test/7.3.4.fs
+++ b/test/7.3.4.fs
@@ -11,7 +11,7 @@ t{ bl word test count swap 0> -> 4 true }t
 
 testing 7.3.4.2 Console input
 
-t{ \ -> supercalafrag }t   \ since 't{}' is a nop this should be fine
+t{ \ -> supercalafrag }t   \ since 't{' is a nop this should be fine
 t{ ' key?   0= -> false }t
 t{ ' key    0= -> false }t
 t{ ' expect 0= -> false }t
@@ -52,7 +52,7 @@ t{ #out @ 0>= -> true }t
 
 testing 7.3.4.6 Display pause
 
-t{ ' exit? 0> -> true }t
+t{ ' exit? 0= -> false }t
 
 testing 7.3.4.7 String literals
 
diff --git a/test/7.3.9.fs b/test/7.3.9.fs
index 86163b2..66bac86 100644
--- a/test/7.3.9.fs
+++ b/test/7.3.9.fs
@@ -6,7 +6,11 @@ T{ : EQU CONSTANT ; -> }T
 T{ X123 EQU Y123 -> }T
 T{ Y123 -> 123 }T
 
-\ todo: 2constant
+t{ 123 456 2CONSTANT X123456 -> }t
+t{ X123456 -> 123 456 }t
+t{ : 2EQU 2CONSTANT ; -> }t
+t{ X123456 2EQU Y123456 -> }t
+t{ Y123456 -> 123 456 }t
 
 T{ 111 VALUE VAL1 -999 VALUE VAL2 -> }T
 T{ VAL1 -> 111 }T
@@ -32,7 +36,9 @@ T{ BUF:TEST DUP ALIGNED = -> TRUE }T
 T{ 111 BUF:TEST ! 222 BUF:TEST CELL+ ! -> }T
 T{ BUF:TEST @ BUF:TEST CELL+ @ -> 111 222 }T
 
-\ todo: alias
+t{ : al1 123 ; -> }t
+t{ alias al2 al1 -> }t
+t{ al2 -> al1 }t
 
 t{ defer df1 -> }t
 t{ ' true to df1 -> }t
@@ -42,7 +48,10 @@ t{ ' false to df1 -> }t
 t{ ' df1 behavior -> ' false }t
 t{ df1 -> false }t
 
-\ todo: struct field
+t{ struct -> 0 }t \ is syntactic sugar for zero
+t{ struct 2 field fld1 1 field fld2 -> 3 }t
+t{ 0 fld1 -> 0 }t
+t{ 0 fld2 -> 2 }t
 
 T{ : NOP : POSTPONE ; ; -> }T
 T{ NOP NOP1 NOP NOP2 -> }T
diff --git a/test/of816-words.fs b/test/of816-words.fs
index 5b87557..e08190b 100644
--- a/test/of816-words.fs
+++ b/test/of816-words.fs
@@ -63,6 +63,8 @@ t{ qt1 execute -> 123 }t
 \ Existence of a couple of words that are hard to test
 t{ ' $empty-wl 0= -> false }t
 t{ ' $env?-wl 0= -> false }t
+t{ ' $sysif 0= -> false }t
+t{ ' $direct 0= -> false }t
 
 \ square root
 decimal
@@ -71,3 +73,5 @@ t{ 4 sqrtrem -> 2 0 }t
 t{ 25 sqrtrem -> 5 0 }t
 t{ 31 sqrtrem -> 5 6 }t
 hex
+
+t{ $memtop @ 0= -> false }t