diff --git a/stages/lisp0/Makefile b/stages/lisp0/Makefile
index 19318f4..216c00f 100644
--- a/stages/lisp0/Makefile
+++ b/stages/lisp0/Makefile
@@ -14,7 +14,7 @@ lisp1.o: lisp1.asm
 	nasm -g -f elf64 -o lisp1.o lisp1.asm
 
 test1: test1.bin
-	./test1.bin
+	./test1.bin --nocapture --test-threads=1
 
 clean:
 	rm -f lisp.o test.bin lisp1.o test1.bin
diff --git a/stages/lisp0/test.rs b/stages/lisp0/test.rs
index 6445b69..10558da 100644
--- a/stages/lisp0/test.rs
+++ b/stages/lisp0/test.rs
@@ -250,61 +250,61 @@ mod tests {
     use std::mem::ManuallyDrop;
     use std::os::fd::AsRawFd;
 
-    // #[test]
-    // fn test_heap_alloc_dealloc() {
-    //     let small = Box::new_in(42u8, HeapAlloc);
-    //     let ptr_sized = Box::new_in(42usize, HeapAlloc);
-    //     let big = Box::new_in([0u8; 48], HeapAlloc);
-    //     let large = Box::new_in([0u8; 1024], HeapAlloc);
-    //     let page_sized = Box::new_in([0u8; 4096], HeapAlloc);
-    //     assert_eq!(*small, 42);
-    //     assert_ne!(
-    //         Box::as_ptr(&small) as *const (),
-    //         Box::as_ptr(&ptr_sized) as *const ()
-    //     );
-    //     let small_ptr = Box::as_ptr(&small) as *const ();
-    //     drop(small);
-    //     let small2 = Box::new_in(43u8, HeapAlloc);
-    //     assert_eq!(*small2, 43);
-    //     assert_eq!(small_ptr, Box::as_ptr(&small2) as *const ());
-    // }
+    #[test]
+    fn test_heap_alloc_dealloc() {
+        let small = Box::new_in(42u8, HeapAlloc);
+        let ptr_sized = Box::new_in(42usize, HeapAlloc);
+        let big = Box::new_in([0u8; 48], HeapAlloc);
+        let large = Box::new_in([0u8; 1024], HeapAlloc);
+        let page_sized = Box::new_in([0u8; 4096], HeapAlloc);
+        assert_eq!(*small, 42);
+        assert_ne!(
+            Box::as_ptr(&small) as *const (),
+            Box::as_ptr(&ptr_sized) as *const ()
+        );
+        let small_ptr = Box::as_ptr(&small) as *const ();
+        drop(small);
+        let small2 = Box::new_in(43u8, HeapAlloc);
+        assert_eq!(*small2, 43);
+        assert_eq!(small_ptr, Box::as_ptr(&small2) as *const ());
+    }
 
-    // #[test]
-    // fn source() {
-    //     let mut file = std::fs::File::open("lisp1.asm").unwrap();
-    //     unsafe {
-    //         init_source(&raw mut IFILE, file.as_raw_fd());
-    //         let SourceIterResult { c, some } = getc();
-    //         assert!(*some);
-    //         assert_eq!(c, b'd');
-    //         let SourceIterResult { c, some } = peekc();
-    //         assert!(*some);
-    //         assert_eq!(c, b'e');
-    //         let SourceIterResult { c, some } = getc();
-    //         assert!(*some);
-    //         assert_eq!(c, b'e');
-    //     }
-    // }
+    #[test]
+    fn source() {
+        let mut file = std::fs::File::open("lisp1.asm").unwrap();
+        unsafe {
+            init_source(&raw mut IFILE, file.as_raw_fd());
+            let SourceIterResult { c, some } = getc();
+            assert!(*some);
+            assert_eq!(c, b'd');
+            let SourceIterResult { c, some } = peekc();
+            assert!(*some);
+            assert_eq!(c, b'e');
+            let SourceIterResult { c, some } = getc();
+            assert!(*some);
+            assert_eq!(c, b'e');
+        }
+    }
 
-    // #[test]
-    // fn parse_list() {
-    //     let file = ManuallyDrop::new(File::open("tests/list.l").unwrap());
-    //     unsafe {
-    //         init_source(&raw mut IFILE, file.as_raw_fd());
-    //         let obj = parse_next_token();
-    //         println!("{:?}", obj);
-    //     }
-    // }
+    #[test]
+    fn parse_list() {
+        let file = ManuallyDrop::new(File::open("tests/list.l").unwrap());
+        unsafe {
+            init_source(&raw mut IFILE, file.as_raw_fd());
+            let obj = parse_next_token();
+            println!("{:?}", obj);
+        }
+    }
 
-    // #[test]
-    // fn parse_quoted_list() {
-    //     let file = ManuallyDrop::new(File::open("tests/quoted-list.l").unwrap());
-    //     unsafe {
-    //         init_source(&raw mut IFILE, file.as_raw_fd());
-    //         let obj = parse_next_token();
-    //         println!("{:?}", obj);
-    //     }
-    // }
+    #[test]
+    fn parse_quoted_list() {
+        let file = ManuallyDrop::new(File::open("tests/quoted-list.l").unwrap());
+        unsafe {
+            init_source(&raw mut IFILE, file.as_raw_fd());
+            let obj = parse_next_token();
+            println!("{:?}", obj);
+        }
+    }
 
     #[test]
     fn parse_atom() {
@@ -316,23 +316,23 @@ mod tests {
         }
     }
 
-    // #[test]
-    // fn parse_pair() {
-    //     let file = ManuallyDrop::new(File::open("tests/pair.l").unwrap());
-    //     unsafe {
-    //         init_source(&raw mut IFILE, file.as_raw_fd());
-    //         let obj = parse_next_token();
-    //         println!("{:?}", obj);
-    //     }
-    // }
+    #[test]
+    fn parse_pair() {
+        let file = ManuallyDrop::new(File::open("tests/pair.l").unwrap());
+        unsafe {
+            init_source(&raw mut IFILE, file.as_raw_fd());
+            let obj = parse_next_token();
+            println!("{:?}", obj);
+        }
+    }
 
-    // #[test]
-    // fn parse_big_number() {
-    //     let file = ManuallyDrop::new(File::open("tests/big-number.l").unwrap());
-    //     unsafe {
-    //         init_source(&raw mut IFILE, file.as_raw_fd());
-    //         let obj = parse_next_token();
-    //         println!("{:?}", obj);
-    //     }
-    // }
+    #[test]
+    fn parse_big_number() {
+        let file = ManuallyDrop::new(File::open("tests/big-number.l").unwrap());
+        unsafe {
+            init_source(&raw mut IFILE, file.as_raw_fd());
+            let obj = parse_next_token();
+            println!("{:?}", obj);
+        }
+    }
 }