diff --git a/opengl/tests/EGLTest/egl_cache_test.cpp b/opengl/tests/EGLTest/egl_cache_test.cpp
index c7d9e3e..c5bf296 100644
--- a/opengl/tests/EGLTest/egl_cache_test.cpp
+++ b/opengl/tests/EGLTest/egl_cache_test.cpp
@@ -41,7 +41,7 @@
 };
 
 TEST_F(EGLCacheTest, UninitializedCacheAlwaysMisses) {
-    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    uint8_t buf[4] = { 0xee, 0xee, 0xee, 0xee };
     mCache->setBlob("abcd", 4, "efgh", 4);
     ASSERT_EQ(0, mCache->getBlob("abcd", 4, buf, 4));
     ASSERT_EQ(0xee, buf[0]);
@@ -51,7 +51,7 @@
 }
 
 TEST_F(EGLCacheTest, InitializedCacheAlwaysHits) {
-    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    uint8_t buf[4] = { 0xee, 0xee, 0xee, 0xee };
     mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
     mCache->setBlob("abcd", 4, "efgh", 4);
     ASSERT_EQ(4, mCache->getBlob("abcd", 4, buf, 4));
@@ -62,7 +62,7 @@
 }
 
 TEST_F(EGLCacheTest, TerminatedCacheAlwaysMisses) {
-    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    uint8_t buf[4] = { 0xee, 0xee, 0xee, 0xee };
     mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
     mCache->setBlob("abcd", 4, "efgh", 4);
     mCache->terminate();
@@ -94,7 +94,7 @@
 };
 
 TEST_F(EGLCacheSerializationTest, ReinitializedCacheContainsValues) {
-    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    uint8_t buf[4] = { 0xee, 0xee, 0xee, 0xee };
     mCache->setCacheFilename(mFilename);
     mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
     mCache->setBlob("abcd", 4, "efgh", 4);
diff --git a/opengl/tests/angeles/app-linux.cpp b/opengl/tests/angeles/app-linux.cpp
index e490351..ced8786 100644
--- a/opengl/tests/angeles/app-linux.cpp
+++ b/opengl/tests/angeles/app-linux.cpp
@@ -118,7 +118,7 @@
         fprintf(stderr, "EGL Error: 0x%04x\n", (int)error);
 }
 
-static int initGraphics(unsigned samples, const WindowSurface& windowSurface)
+static int initGraphics(EGLint samples, const WindowSurface& windowSurface)
 {
     EGLint configAttribs[] = {
             EGL_DEPTH_SIZE, 16,
diff --git a/opengl/tests/fillrate/fillrate.cpp b/opengl/tests/fillrate/fillrate.cpp
index 1d9b026..2db63d7 100644
--- a/opengl/tests/fillrate/fillrate.cpp
+++ b/opengl/tests/fillrate/fillrate.cpp
@@ -91,11 +91,13 @@
          }
      }
 
+     const GLfloat fh = h;
+     const GLfloat fw = w;
      const GLfloat vertices[4][2] = {
-             { 0,  0 },
-             { 0,  h },
-             { w,  h },
-             { w,  0 }
+             { 0,   0  },
+             { 0,   fh },
+             { fw,  fh },
+             { fw,  0  }
      };
 
      const GLfloat texCoords[4][2] = {
diff --git a/opengl/tests/filter/filter.cpp b/opengl/tests/filter/filter.cpp
index 289e6cc..287ee93 100644
--- a/opengl/tests/filter/filter.cpp
+++ b/opengl/tests/filter/filter.cpp
@@ -140,11 +140,12 @@
 
      //glDrawTexiOES(0, 0, 0, dim, dim);
      
+     const GLfloat fdim = dim;
      const GLfloat vertices[4][2] = {
-             { 0,    0   },
-             { 0,    dim },
-             { dim,  dim },
-             { dim,  0   }
+             { 0,     0    },
+             { 0,     fdim },
+             { fdim,  fdim },
+             { fdim,  0    }
      };
 
      const GLfloat texCoords[4][2] = {
diff --git a/opengl/tests/linetex/linetex.cpp b/opengl/tests/linetex/linetex.cpp
index 7921f80..5ad695b 100644
--- a/opengl/tests/linetex/linetex.cpp
+++ b/opengl/tests/linetex/linetex.cpp
@@ -80,9 +80,11 @@
      // default pack-alignment is 4
      const uint16_t t16[64] = { 0xFFFF, 0, 0xF800, 0, 0x07E0, 0, 0x001F, 0 };
 
+     const GLfloat fh = h;
+     const GLfloat fw2 = w/2;
      const GLfloat vertices[4][2] = {
-             { w/2,  0 },
-             { w/2,  h }
+             { fw2,  0  },
+             { fw2,  fh }
      };
 
      const GLfloat texCoords[4][2] = {