diff --git a/tests/array.cc b/tests/array.cc
deleted file mode 100644
index 02a802d..0000000
--- a/tests/array.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-#include <assert.h>
-#include "ostd/array.hh"
-#include "ostd/string.hh"
-
-using namespace ostd;
-
-int main() {
-    Array<int, 5> x = { 2, 4, 8, 16, 32 };
-
-    assert(x.front() == 2);
-    assert(x.back() == 32);
-
-    assert(x[0] == 2);
-    assert(x[2] == 8);
-
-    assert(*(x.at(0)) == x[0]);
-    assert(*(x.at(3)) == x[3]);
-
-    assert(x.size() == 5);
-
-    assert(!x.empty());
-
-    assert(x.in_range(4));
-    assert(x.in_range(0));
-    assert(!x.in_range(5));
-
-    assert(x.data()[0] == x[0]);
-
-    auto r = x.iter();
-    assert(r.front() == 2);
-    assert(r.back() == 32);
-
-    Array<int, 5> z;
-    x.swap(z);
-
-    assert(z.front() == 2);
-    assert(z.back() == 32);
-
-    assert(z.size() == 5);
-
-    assert(to_string(z) == "{2, 4, 8, 16, 32}");
-
-    return 0;
-}
diff --git a/tests/utility.cc b/tests/utility.cc
deleted file mode 100644
index 9d24fc4..0000000
--- a/tests/utility.cc
+++ /dev/null
@@ -1,90 +0,0 @@
-#include <assert.h>
-#include "ostd/utility.hh"
-#include "ostd/string.hh"
-
-using namespace ostd;
-
-struct Foo {
-    int x;
-    Foo(): x(5) {}
-    Foo(int v): x(v) {}
-    Foo(const Foo &o): x(o.x) {}
-    Foo(Foo &&o): x(o.x) { o.x = 0; }
-    Foo &operator=(int v) {
-        x = v;
-        return *this;
-    }
-};
-
-struct NotSwappable {
-    int i;
-    NotSwappable(int v): i(v) {}
-};
-
-struct Swappable {
-    int i;
-    bool swapped;
-    Swappable(int v): i(v), swapped(false) {}
-    void swap(Swappable &v) {
-        auto j = i;
-        i = v.i;
-        v.i = j;
-        swapped = v.swapped = true;
-    }
-};
-
-int main() {
-    Foo bar(150);
-    Foo baz(move(bar));
-
-    assert(bar.x == 0);
-    assert(baz.x == 150);
-
-    Foo cp(baz);
-
-    assert(baz.x == 150);
-    assert(cp.x == 150);
-
-    auto i = exchange(baz, 20);
-    assert(baz.x == 20);
-    assert(i.x == 150);
-
-    NotSwappable nsx(10);
-    NotSwappable nsy(20);
-
-    swap(nsx, nsy);
-    assert(nsx.i == 20);
-    assert(nsy.i == 10);
-
-    Swappable sx(10);
-    Swappable sy(20);
-
-    assert(!sx.swapped);
-    assert(!sy.swapped);
-
-    swap(sx, sy);
-    assert(sx.swapped);
-    assert(sy.swapped);
-    assert(sx.i == 20);
-    assert(sy.i == 10);
-
-    int ai[3] = { 5, 10, 15 };
-    int bi[3] = { 6, 11, 16 };
-    swap(ai, bi);
-
-    assert(ai[0] == 6);
-    assert(bi[2] == 15);
-
-    auto x = make_pair(5, 3.14f);
-
-    assert((IsSame<decltype(x.first), int>));
-    assert((IsSame<decltype(x.second), float>));
-
-    assert(x.first == 5);
-    assert(x.second == 3.14f);
-
-    auto st = make_pair(5, 10);
-    assert(to_string(st) == "{5, 10}");
-
-    return 0;
-}
diff --git a/tests/vector.cc b/tests/vector.cc
deleted file mode 100644
index 91dd475..0000000
--- a/tests/vector.cc
+++ /dev/null
@@ -1,93 +0,0 @@
-#include <assert.h>
-#include "ostd/vector.hh"
-#include "ostd/string.hh"
-
-using namespace ostd;
-
-int main() {
-    Vector<int> x = { 5, 10, 15, 20 };
-
-    assert(x.front() == 5);
-    assert(x.back() == 20);
-
-    assert(x[0] == 5);
-    assert(x[2] == 15);
-
-    assert(*(x.at(0)) == x[0]);
-    assert(*(x.at(3)) == x[3]);
-
-    assert(x.data()[0] == x[0]);
-
-    assert(x.size() == 4);
-
-    Vector<int> y(5, 10);
-
-    assert(y.size() == 5);
-    assert(y.front() == 10);
-    assert(y.back() == 10);
-
-    Vector<int> z(x);
-
-    assert(x.front() == z.front());
-    assert(x.back() == z.back());
-
-    z.clear();
-
-    assert(z.size() == 0);
-    assert(z.capacity() != 0);
-    assert(z.empty());
-
-    z = move(y);
-
-    assert(z.size() == 5);
-    assert(y.size() == 0);
-    assert(z.front() == 10);
-    assert(z.back() == 10);
-
-    z.resize(150, 5);
-    assert(z.size() == 150);
-    assert(z.front() == 10);
-    assert(z.back() == 5);
-
-    assert(z.push(30) == 30);
-    assert(z.back() == 30);
-
-    assert(z.emplace_back(20) == 20);
-    assert(z.back() == 20);
-
-    z.clear();
-    z.resize(10, 5);
-
-    assert(z.in_range(9));
-    assert(z.in_range(0));
-    assert(!z.in_range(10));
-
-    z.insert(2, 4);
-    assert(z[2] == 4);
-    assert(z[0] == 5);
-    assert(z[3] == 5);
-    assert(z.size() == 11);
-
-    auto r = z.iter();
-    assert(r.front() == 5);
-    assert(r.back() == 5);
-    assert(r[2] == 4);
-
-    auto r2 = iter(z);
-    assert(r.front() == r2.front());
-
-    Vector<int> w;
-    w.swap(z);
-
-    assert(z.size() == 0);
-    assert(w.size() != 0);
-    assert(w.front() == 5);
-    assert(w.back() == 5);
-
-    int pushn[] = { 3, 2, 1 };
-    w.push_n(pushn, 3);
-
-    assert(to_string(w) == "{5, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1}");
-
-    return 0;
-}