diff --git a/9unit.c b/9unit.c
index b5c0b90..ff7b8b5 100644
--- a/9unit.c
+++ b/9unit.c
@@ -19,26 +19,23 @@
 */
 
 #include <u.h>
+#include <libc.h>
 #include <stdio.h>
 
 #include "9unit.h"
 
-void
-initTestState(TestState *s)
-{
-	if (!s) return;
-	s->run = 0;
-	s->passed = 0;
-	s->failed = 0;
-	s->postponed = 0;
-}
+// Internal Prototypes
+
+static void init_TestState(TestState *s);
+
+// Public Functions
 
 void
-runTest(TestState *s, TestResult (*t)(void))
+run_test(TestState *s, TestResult (*t)(TestState *))
 {
 	if (!(s && t)) return;
 	s->run++;
-	switch ((*t)())
+	switch ((*t)(s))
 	{
 	case test_success:
 		s->passed++;
@@ -49,15 +46,17 @@ runTest(TestState *s, TestResult (*t)(void))
 	case test_postponed:
 		s->postponed++;
 		break;
+	default:
+		exits("test returned an invalid response");
 	}
 }
 
 void
-runTests(void (*tests)(TestState *))
+run_tests(void (*tests)(TestState *))
 {
 	if(!tests) return;
 	TestState s;
-	initTestState(&s);
+	init_TestState(&s);
 	(*tests)(&s);
 	printf("Tests run: %d\n", s.run);
 	printf("Tests passed: %d\n", s.passed);
@@ -65,4 +64,18 @@ runTests(void (*tests)(TestState *))
 	printf("Tests postponed: %d\n", s.postponed);
 }
 
+// Internal Functions
+
+static void
+init_TestState(TestState *s)
+{
+	if (!s) return;
+	s->run = 0;
+	s->passed = 0;
+	s->failed = 0;
+	s->postponed = 0;
+	s->first_log = 0;
+	s->last_log = 0;
+}
+
 //jl
diff --git a/9unit.h b/9unit.h
index d0a3936..4bf31f7 100644
--- a/9unit.h
+++ b/9unit.h
@@ -19,34 +19,47 @@
 */
 
 // Tracks information about the tests being run.
-typedef struct TestState
+typedef struct TestState TestState;
+
+// Defines a log entry in a TestState struct
+typedef struct TestLogEntry TestLogEntry;
+
+// The following structures will typically be maintained by the
+// testing framework.  You shouldn't need to concern yourself with
+// them.
+struct TestState
 {
 	int run; // number of tests run
 	int passed; // number of successful tests
 	int failed; // number of failed tests
 	int postponed; // number of postponed tests
-} TestState;
+	TestLogEntry *first_log; // the first log entry
+	TestLogEntry *last_log; //the last log entry
+};
+
+struct TestLogEntry
+{
+	char *text; // the entry text
+	TestLogEntry *next; // points to the next entry
+};
 
 // Possible results of running a single test
 typedef enum TestResult
 {
-	test_success,
-	test_failure,
-	test_postponed
+	test_success, // the test succeeded
+	test_failure, // the test failed
+	test_postponed // the test was postponed
 } TestResult;
 
-// Initializes a TestState value
-extern void initTestState(TestState *);
-
 // Runs a single test
-extern void runTest(
+extern void run_test(
 	TestState *, // the TestState data
-	TestResult (*)(void) // the test to run
+	TestResult (*)(TestState *) // the test to run
 );
 
 // Runs multiple tests, displaying a summary at the end
-extern void runTests(
-    // function that runs the tests and updates the provided TestState
+extern void run_tests(
+    // runs the tests and updates a provided TestState
 	void (*)(TestState *)
 );