diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..cdcea7e
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,2 @@
+
+BasedOnStyle: WebKit
diff --git a/src/alloc_backend.c b/src/alloc_backend.c
index 1657cbb..6da4ffe 100644
--- a/src/alloc_backend.c
+++ b/src/alloc_backend.c
@@ -13,15 +13,14 @@
  */
 void* call_alloc_backend(size_t size)
 {
-    void *p = mmap(
-            NULL,
-            size,
-            PROT_READ | PROT_WRITE, 
-            MAP_ANONYMOUS | MAP_PRIVATE,
-            -1, /* man mmap(2): "[...], some implementations require fd to be
-                   -1 if MAP_ANONYMOUS is specified [...]" */
-            0
-    );
+    void* p = mmap(
+        NULL,
+        size,
+        PROT_READ | PROT_WRITE,
+        MAP_ANONYMOUS | MAP_PRIVATE,
+        -1, /* man mmap(2): "[...], some implementations require fd to be
+               -1 if MAP_ANONYMOUS is specified [...]" */
+        0);
 
     if (p == MAP_FAILED)
         return NULL;
diff --git a/src/arena.c b/src/arena.c
index 4174865..375e185 100644
--- a/src/arena.c
+++ b/src/arena.c
@@ -5,7 +5,7 @@
 #include <errno.h>
 #include <unistd.h>
 
-#define ARENA_SIZE ((size_t)(128*sysconf(_SC_PAGE_SIZE)))
+#define ARENA_SIZE ((size_t)(128 * sysconf(_SC_PAGE_SIZE)))
 
 typedef unsigned char byte;
 
@@ -16,38 +16,36 @@ struct arena* arena_new()
 {
     size_t size = ARENA_SIZE;
 
-    byte *p = call_alloc_backend(size);
+    byte* p = call_alloc_backend(size);
 
     if (p == NULL)
         return NULL;
 
-    arena_t *a = (arena_t*)p;
+    arena_t* a = (arena_t*)p;
 
-    *a = (arena_t){
+    *a = (arena_t) {
         .begin = p + sizeof(struct arena),
-        .next  = p + sizeof(struct arena),
-        .cap   = size - sizeof(struct arena)
+        .next = p + sizeof(struct arena),
+        .cap = size - sizeof(struct arena)
     };
 
     return (arena_t*)a;
 }
 
-
 /*
  * Frees all memory in arena
  */
-void arena_reset(struct arena *a)
+void arena_reset(struct arena* a)
 {
     a->next = a->begin;
 }
 
-
 /*
  * Allocate new memory using arena
  */
-void* arena_alloc(struct arena *a, size_t len)
+void* arena_alloc(struct arena* a, size_t len)
 {
-    void *p = a->next;
+    void* p = a->next;
     a->next = (byte*)(a->next) + len;
 
     if ((byte*)(a->next) > (byte*)(a->begin) + a->cap) {
@@ -57,4 +55,3 @@ void* arena_alloc(struct arena *a, size_t len)
 
     return p;
 }
-
diff --git a/src/arena.h b/src/arena.h
index fa0f139..7b41151 100644
--- a/src/arena.h
+++ b/src/arena.h
@@ -6,13 +6,12 @@
 
 typedef struct arena {
     void *begin,
-         *next;
+        *next;
     size_t cap;
 } __attribute__((aligned(sizeof(void*)))) arena_t;
 
 arena_t* arena_new();
-void arena_reset(arena_t *a);
-void* arena_alloc(arena_t *a, size_t len);
-
+void arena_reset(arena_t* a);
+void* arena_alloc(arena_t* a, size_t len);
 
 #endif
diff --git a/src/test_arena.c b/src/test_arena.c
index 208f8e4..2209ae7 100644
--- a/src/test_arena.c
+++ b/src/test_arena.c
@@ -1,6 +1,5 @@
 
 
-
 // _start test_arena_alloc.c
 #include "arena.h"
 
@@ -9,7 +8,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-static struct arena *default_arena = NULL;
+static struct arena* default_arena = NULL;
 
 int main()
 {
@@ -19,14 +18,17 @@ int main()
         err(errno, "failed to allocate arena");
     }
 
-	printf("\ntest 1: %s", "attempt to allocate arena->cap x 1 byte");
+    printf("\nAttempt to do `arena->cap` allocations of 1 byte");
 
-	for (size_t i = 0; i < default_arena->cap; i++) {
-		volatile void *c = arena_alloc(default_arena, 1);
-		if (c == NULL) {
-			err(EXIT_FAILURE, "failed to allocate memory");
-		}	
-	}
+    for (size_t i = 0; i < default_arena->cap; i++) {
+        char* c = arena_alloc(default_arena, 1);
+        *c = i & 0xff;
+        if (c == NULL) {
+            err(EXIT_FAILURE, "failed to allocate memory");
+        }
+    }
+
+    printf("\n    OK");
 
     return 0;
 }