diff --git a/libs/hwui/Android.mk b/libs/hwui/Android.mk
index 62594667086a2..8857c41dc33d5 100644
--- a/libs/hwui/Android.mk
+++ b/libs/hwui/Android.mk
@@ -247,6 +247,7 @@ LOCAL_SRC_FILES += \
     tests/unit/DamageAccumulatorTests.cpp \
     tests/unit/DeviceInfoTests.cpp \
     tests/unit/FatVectorTests.cpp \
+    tests/unit/FontRendererTests.cpp \
     tests/unit/GlopBuilderTests.cpp \
     tests/unit/GpuMemoryTrackerTests.cpp \
     tests/unit/GradientCacheTests.cpp \
diff --git a/libs/hwui/FontRenderer.cpp b/libs/hwui/FontRenderer.cpp
index 1b618c6a71c6a..276c18d0d3f9e 100644
--- a/libs/hwui/FontRenderer.cpp
+++ b/libs/hwui/FontRenderer.cpp
@@ -689,7 +689,7 @@ bool FontRenderer::renderTextOnPath(const SkPaint* paint, const Rect* clip, cons
 void FontRenderer::blurImage(uint8_t** image, int32_t width, int32_t height, float radius) {
     uint32_t intRadius = Blur::convertRadiusToInt(radius);
 #ifdef ANDROID_ENABLE_RENDERSCRIPT
-    if (width * height * intRadius >= RS_MIN_INPUT_CUTOFF) {
+    if (width * height * intRadius >= RS_MIN_INPUT_CUTOFF && radius <= 25.0f) {
         uint8_t* outImage = (uint8_t*) memalign(RS_CPU_ALLOCATION_ALIGNMENT, width * height);
 
         if (mRs == nullptr) {
diff --git a/libs/hwui/tests/unit/FontRendererTests.cpp b/libs/hwui/tests/unit/FontRendererTests.cpp
new file mode 100644
index 0000000000000..99080ac938e74
--- /dev/null
+++ b/libs/hwui/tests/unit/FontRendererTests.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "GammaFontRenderer.h"
+#include "tests/common/TestUtils.h"
+
+using namespace android::uirenderer;
+
+static bool isZero(uint8_t* data, int size) {
+    for (int i = 0; i < size; i++) {
+        if (data[i]) return false;
+    }
+    return true;
+}
+
+RENDERTHREAD_TEST(FontRenderer, renderDropShadow) {
+    SkPaint paint;
+    paint.setTextSize(10);
+    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
+    GammaFontRenderer gammaFontRenderer;
+    FontRenderer& fontRenderer = gammaFontRenderer.getFontRenderer();
+    fontRenderer.setFont(&paint, SkMatrix::I());
+
+    std::vector<glyph_t> glyphs;
+    std::vector<float> positions;
+    float totalAdvance;
+    Rect bounds;
+    TestUtils::layoutTextUnscaled(paint, "This is a test",
+            &glyphs, &positions, &totalAdvance, &bounds);
+
+    for (int radius : {28, 20, 2}) {
+        auto result = fontRenderer.renderDropShadow(&paint, glyphs.data(), glyphs.size(),
+                radius, positions.data());
+        ASSERT_NE(nullptr, result.image);
+        EXPECT_FALSE(isZero(result.image, result.width * result.height));
+        EXPECT_LE(bounds.getWidth() + radius * 2, (int) result.width);
+        EXPECT_LE(bounds.getHeight() + radius * 2, (int) result.height);
+        delete result.image;
+    }
+}