diff --git a/libion/tests/Android.mk b/libion/tests/Android.mk
index 894f90e..d4d07c2 100644
--- a/libion/tests/Android.mk
+++ b/libion/tests/Android.mk
@@ -17,8 +17,9 @@
 LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
+LOCAL_CLANG := true
 LOCAL_MODULE := ion-unit-tests
-LOCAL_CFLAGS += -g -Wall -Werror -std=gnu++11 -Wno-missing-field-initializers
+LOCAL_CFLAGS += -g -Wall -Werror -Wno-missing-field-initializers
 LOCAL_SHARED_LIBRARIES += libion
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/../kernel-headers
 LOCAL_SRC_FILES := \
diff --git a/libion/tests/allocate_test.cpp b/libion/tests/allocate_test.cpp
index e26b302..3c4524e 100644
--- a/libion/tests/allocate_test.cpp
+++ b/libion/tests/allocate_test.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <memory>
 #include <sys/mman.h>
 
 #include <gtest/gtest.h>
@@ -90,7 +91,7 @@
 
 TEST_F(Allocate, Zeroed)
 {
-    void *zeroes = calloc(4096, 1);
+    auto zeroes_ptr = std::make_unique<char[]>(4096);
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);
@@ -125,14 +126,11 @@
         ptr = mmap(NULL, 4096, PROT_READ, MAP_SHARED, map_fd, 0);
         ASSERT_TRUE(ptr != NULL);
 
-        ASSERT_EQ(0, memcmp(ptr, zeroes, 4096));
+        ASSERT_EQ(0, memcmp(ptr, zeroes_ptr.get(), 4096));
 
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(zeroes);
-
 }
 
 TEST_F(Allocate, Large)
diff --git a/libion/tests/device_test.cpp b/libion/tests/device_test.cpp
index 6f6e1bd..0be52bf 100644
--- a/libion/tests/device_test.cpp
+++ b/libion/tests/device_test.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <fcntl.h>
+#include <memory>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -133,8 +134,8 @@
 
 TEST_F(Device, KernelReadCached)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);
@@ -161,14 +162,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, KernelWriteCached)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (int i = 0; i < 4096; i++)
         ((char *)buf)[i] = i;
@@ -195,14 +194,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, DMAReadCached)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);
@@ -227,14 +224,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, DMAWriteCached)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (int i = 0; i < 4096; i++)
         ((char *)buf)[i] = i;
@@ -261,14 +256,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, KernelReadCachedNeedsSync)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);
@@ -295,14 +288,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, KernelWriteCachedNeedsSync)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (int i = 0; i < 4096; i++)
         ((char *)buf)[i] = i;
@@ -329,14 +320,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, DMAReadCachedNeedsSync)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);
@@ -363,14 +352,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, DMAWriteCachedNeedsSync)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (int i = 0; i < 4096; i++)
         ((char *)buf)[i] = i;
@@ -399,13 +386,11 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 TEST_F(Device, KernelRead)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);
@@ -432,14 +417,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, KernelWrite)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (int i = 0; i < 4096; i++)
         ((char *)buf)[i] = i;
@@ -466,14 +449,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, DMARead)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);
@@ -498,14 +479,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, DMAWrite)
 {
-    void *alloc = malloc(8192 + 1024);
-    void *buf = (void *)(ALIGN((unsigned long)alloc, 4096) + 1024);
+    auto alloc_ptr = std::make_unique<char[]>(8192 + 1024);
+    void *buf = (void *)(ALIGN((unsigned long)alloc_ptr.get(), 4096) + 1024);
 
     for (int i = 0; i < 4096; i++)
         ((char *)buf)[i] = i;
@@ -532,13 +511,12 @@
         ASSERT_EQ(0, munmap(ptr, 4096));
         ASSERT_EQ(0, close(map_fd));
     }
-
-    free(alloc);
 }
 
 TEST_F(Device, IsCached)
 {
-    void *buf = malloc(4096);
+    auto buf_ptr = std::make_unique<char[]>(4096);
+    void *buf = buf_ptr.get();
 
     for (unsigned int heapMask : m_allHeaps) {
         SCOPED_TRACE(::testing::Message() << "heap " << heapMask);