diff --git a/opengl/tests/lib/WindowSurface.cpp b/opengl/tests/lib/WindowSurface.cpp
index 2b76279..b06422a 100644
--- a/opengl/tests/lib/WindowSurface.cpp
+++ b/opengl/tests/lib/WindowSurface.cpp
@@ -57,7 +57,7 @@
     sp<SurfaceControl> sc = surfaceComposerClient->createSurface(
             String8("Benchmark"), width, height,
             PIXEL_FORMAT_RGBX_8888, ISurfaceComposerClient::eOpaque);
-    if (sc == NULL || !sc->isValid()) {
+    if (sc == nullptr || !sc->isValid()) {
         fprintf(stderr, "Failed to create SurfaceControl\n");
         return;
     }
diff --git a/opengl/tests/lib/glTestLib.cpp b/opengl/tests/lib/glTestLib.cpp
index 213dffd..290d7a0 100644
--- a/opengl/tests/lib/glTestLib.cpp
+++ b/opengl/tests/lib/glTestLib.cpp
@@ -37,7 +37,7 @@
 {
     const char *v = (const char *) glGetString(s);
 
-    if (v == NULL) {
+    if (v == nullptr) {
         testPrintI("GL %s unknown", name);
     } else {
         testPrintI("GL %s = %s", name, v);
diff --git a/opengl/tests/lib/include/EGLUtils.h b/opengl/tests/lib/include/EGLUtils.h
index 9dc6bcf..eb9571d 100644
--- a/opengl/tests/lib/include/EGLUtils.h
+++ b/opengl/tests/lib/include/EGLUtils.h
@@ -100,11 +100,11 @@
     if (!attrs)
         return BAD_VALUE;
 
-    if (outConfig == NULL)
+    if (outConfig == nullptr)
         return BAD_VALUE;
 
     // Get all the "potential match" configs...
-    if (eglGetConfigs(dpy, NULL, 0, &numConfigs) == EGL_FALSE)
+    if (eglGetConfigs(dpy, nullptr, 0, &numConfigs) == EGL_FALSE)
         return BAD_VALUE;
 
     std::vector<EGLConfig> configs(numConfigs);
@@ -113,7 +113,7 @@
     }
 
     int i;
-    EGLConfig config = NULL;
+    EGLConfig config = nullptr;
     for (i=0 ; i<n ; i++) {
         EGLint nativeVisualId = 0;
         eglGetConfigAttrib(dpy, configs[i], EGL_NATIVE_VISUAL_ID, &nativeVisualId);
@@ -243,7 +243,7 @@
 
 bool EGLUtils::printEGLConfigurations(EGLDisplay dpy, String8& msg) {
     EGLint numConfig = 0;
-    EGLint returnVal = eglGetConfigs(dpy, NULL, 0, &numConfig);
+    EGLint returnVal = eglGetConfigs(dpy, nullptr, 0, &numConfig);
     msg.append(checkEglError("eglGetConfigs", returnVal));
     if (!returnVal) {
         return false;