diff --git a/src/Makefile b/src/Makefile
index 518d5c5..221e4e6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -8,7 +8,7 @@ SCRIPTDIR ?= /usr/local/share/pebblisp
 GCC_COM ?= gcc -g -O0 -Wall -o $(exe) -D STANDALONE -DSCRIPTDIR=\"$(SCRIPTDIR)\"
 
 all:
-	$(GCC_COM) $(files) && ./tests.sh
+	$(GCC_COM) $(files) && echo; ./tests.sh
 
 notest:
 	$(GCC_COM) $(files)
diff --git a/src/tests.sh b/src/tests.sh
index 1f194d0..24aa3ba 100755
--- a/src/tests.sh
+++ b/src/tests.sh
@@ -40,7 +40,6 @@ fail() {
 }
 
 check() {
-    local output
     if $VALGRIND; then
         local output=$($VALCOM ./pl "(loadfile \"examples/lib.pbl\") $2")
     else
@@ -56,7 +55,6 @@ check() {
 }
 
 echo "STARTING TESTS"
-echo ""
 
 title "Plain returns"
 check "PlainRet" "10" "10"
@@ -84,11 +82,16 @@ check "LessThan" "(< 23847123 19375933)" "F"
 check "Equality" "(= 987654321 987654321 )" "T"
 check "StringEquality" "(= \"Bean\" \"Bean\" )" "T"
 check "StringInequality" "(= \"Beans\" \"Bean\" )" "F"
+check "NullInequality" "(= \"Beans\" \"\" )" "F"
 endBlock
 
 title "TypeCheck"
 check "IsNum" "(isnum 23847123)" "T"
 check "IsntNum" "(isnum \"WORDS\")" "F"
+check "IsString" "(isstr 'words')" "T"
+check "IsStringEmpty" "(isstr '')" "T"
+check "NumNotString" "(isstr 5)" "F"
+check "ListNotString" "(isstr ('hello'))" "F"
 endBlock
 
 title "Ifs/Bools"
@@ -132,18 +135,20 @@ endBlock
 title "Lambdas"
 check "MultStmt" "(def yee (fn (a) (* 10 a))) ; (yee 5)" "50"
 check "DefinMap" "(def yee (fn (a) (* 10 a))) ; (map yee (5 10 2 (+ 12 0)))" "( 50 100 20 120 )"
-check "FbnciSeq" "(def fib (fn (a) \
-                    (if (< a 2) \
-                      a \
-                      (+ (fib (- a 1)) (fib (- a 2))) \
-                  )));\
-                  (fib 20)" "6765"
-check "Factorial" "(def fac (fn (a) \
-                     (if (= a 1) \
-                       1 \
-                       (* a (fac (- a 1)) ) \
-                   )));\
-                   (fac 11)" "39916800"
+check "FbnciSeq" "\
+  (def fib (fn (a) \
+    (if (< a 2) \
+      a \
+      (+ (fib (- a 1)) (fib (- a 2))) \
+  )));\
+  (fib 20)" "6765"
+check "Factorial" "\
+  (def fac (fn (a) \
+    (if (= a 1) \
+      1 \
+      (* a (fac (- a 1)) ) \
+  )));\
+  (fac 11)" "39916800"
 check "LambdaClone" "(def y (fn (a) (* 10 a))) (def b y) (def y 12345) ((b 5) y)" "( 50 12345 )"
 check "Duplicate" "(def dupe (fn (a) (() (a a a))));(dupe (*10 10))" "( 100 100 100 )"
 endBlock