diff --git a/src/Magnum/Test/CubeMapTextureArrayGLTest.cpp b/src/Magnum/Test/CubeMapTextureArrayGLTest.cpp
index be526200a..220b07d42 100644
--- a/src/Magnum/Test/CubeMapTextureArrayGLTest.cpp
+++ b/src/Magnum/Test/CubeMapTextureArrayGLTest.cpp
@@ -712,6 +712,7 @@ void CubeMapTextureArrayGLTest::compressedImageBuffer() {
 
 namespace {
     constexpr UnsignedByte Zero[4*4*4*6]{};
+    #ifndef MAGNUM_TARGET_GLES
     constexpr UnsignedByte SubDataComplete[]{
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
@@ -743,6 +744,7 @@ namespace {
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
     };
+    #endif
 }
 
 void CubeMapTextureArrayGLTest::subImage() {
@@ -873,6 +875,7 @@ namespace {
     /* Just 12x12x6 zeros compressed using RGBA DXT3 by the driver */
     constexpr UnsignedByte CompressedZero[9*16*6]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     /* Combination of CompressedZero and CompressedSubData */
     constexpr UnsignedByte CompressedSubDataComplete[] = {
         0, 0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0,
@@ -933,6 +936,7 @@ namespace {
         0, 0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0,
         0, 0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0
     };
+    #endif
 }
 
 void CubeMapTextureArrayGLTest::compressedSubImage() {
diff --git a/src/Magnum/Test/CubeMapTextureGLTest.cpp b/src/Magnum/Test/CubeMapTextureGLTest.cpp
index 26479fee1..9d65a1056 100644
--- a/src/Magnum/Test/CubeMapTextureGLTest.cpp
+++ b/src/Magnum/Test/CubeMapTextureGLTest.cpp
@@ -657,12 +657,14 @@ void CubeMapTextureGLTest::imageBuffer() {
 namespace {
     constexpr UnsignedByte Zero[4*4*4]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     constexpr UnsignedByte SubDataComplete[]{
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0,
         0, 0, 0, 0, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
     };
+    #endif
 }
 
 void CubeMapTextureGLTest::subImage() {
@@ -956,6 +958,7 @@ namespace {
     /* Just 12x12 zeros compressed using RGBA DXT3 by the driver */
     constexpr UnsignedByte CompressedZero[9*16]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     /* Combination of CompressedZero and CompressedData */
     constexpr UnsignedByte CompressedSubDataComplete[]{
           0,   0,   0,   0,   0,   0,   0,   0,
@@ -979,6 +982,7 @@ namespace {
           0,   0,   0,   0,   0,   0,   0,   0,
           0,   0,   0,   0,   0,   0,   0,   0
     };
+    #endif
 }
 
 void CubeMapTextureGLTest::compressedSubImage() {
diff --git a/src/Magnum/Test/TextureArrayGLTest.cpp b/src/Magnum/Test/TextureArrayGLTest.cpp
index b73465f9a..c3d0478b3 100644
--- a/src/Magnum/Test/TextureArrayGLTest.cpp
+++ b/src/Magnum/Test/TextureArrayGLTest.cpp
@@ -1066,6 +1066,7 @@ void TextureArrayGLTest::image2DBuffer() {
 namespace {
     constexpr UnsignedByte Zero2D[4*4*4*4]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     constexpr UnsignedByte SubData2DComplete[]{
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
@@ -1087,6 +1088,7 @@ namespace {
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
     };
+    #endif
 }
 
 void TextureArrayGLTest::subImage2D() {
@@ -1298,6 +1300,7 @@ namespace {
     /* Just 12x4x4 zeros compressed using RGBA DXT3 by the driver */
     constexpr UnsignedByte CompressedZero2D[3*4*16]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     /* Combination of CompressedZero2D and CompressedData2D */
     constexpr UnsignedByte CompressedSubData2DComplete[]{
           0,   0,   0,   0,   0,   0,   0,   0,
@@ -1328,6 +1331,7 @@ namespace {
           0,   0,   0,   0,   0,   0,   0,   0,
           0,   0,   0,   0,   0,   0,   0,   0
     };
+    #endif
 }
 
 void TextureArrayGLTest::compressedSubImage2D() {
diff --git a/src/Magnum/Test/TextureGLTest.cpp b/src/Magnum/Test/TextureGLTest.cpp
index aa5ed5a2e..95c81458a 100644
--- a/src/Magnum/Test/TextureGLTest.cpp
+++ b/src/Magnum/Test/TextureGLTest.cpp
@@ -1451,12 +1451,14 @@ void TextureGLTest::image2DBuffer() {
 namespace {
     constexpr UnsignedByte Zero2D[4*4*4]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     constexpr UnsignedByte SubData2DComplete[]{
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0,
         0, 0, 0, 0, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
     };
+    #endif
 }
 
 void TextureGLTest::subImage2D() {
@@ -1653,6 +1655,7 @@ namespace {
     /* Just 12x4 zeros compressed using RGBA DXT3 by the driver */
     constexpr UnsignedByte CompressedZero2D[3*16]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     /* Combination of CompressedZero2D and CompressedData2D */
     constexpr UnsignedByte CompressedSubData2DComplete[]{
           0,   0,   0,   0,   0,   0,   0,   0,
@@ -1662,6 +1665,7 @@ namespace {
           0,   0,   0,   0,   0,   0,   0,   0,
           0,   0,   0,   0,   0,   0,   0,   0
     };
+    #endif
 }
 
 void TextureGLTest::compressedSubImage2D() {
@@ -1874,6 +1878,7 @@ void TextureGLTest::image3DBuffer() {
 namespace {
     constexpr UnsignedByte Zero3D[4*4*4*4]{};
 
+    #ifndef MAGNUM_TARGET_GLES
     constexpr UnsignedByte SubData3DComplete[]{
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
@@ -1895,6 +1900,7 @@ namespace {
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
         0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
     };
+    #endif
 }
 
 void TextureGLTest::subImage3D() {
@@ -2077,6 +2083,7 @@ void TextureGLTest::compressedImage3DBuffer() {
 #endif
 
 namespace {
+    #ifndef MAGNUM_TARGET_GLES
     /* Just 12x4x4 zeros compressed using RGBA BPTC Unorm by the driver */
     constexpr UnsignedByte CompressedZero3D[3*4*16]{
         64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -2118,6 +2125,7 @@ namespace {
         64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
     };
+    #endif
 }
 
 void TextureGLTest::compressedSubImage3D() {
diff --git a/src/Magnum/Test/TransformFeedbackGLTest.cpp b/src/Magnum/Test/TransformFeedbackGLTest.cpp
index 835c30e1b..4c0d14305 100644
--- a/src/Magnum/Test/TransformFeedbackGLTest.cpp
+++ b/src/Magnum/Test/TransformFeedbackGLTest.cpp
@@ -66,6 +66,7 @@ struct TransformFeedbackGLTest: OpenGLTester {
 
 namespace {
 
+#ifndef MAGNUM_TARGET_GLES
 enum: std::size_t { DrawDataCount = 4 };
 
 const struct {
@@ -81,6 +82,7 @@ const struct {
     {"stream", 1, 1, 0, 6, 6},
     {"streamInstanced", 1, 5, 0, 6, 30}
 };
+#endif
 
 }