diff --git a/tests/dnn/.gitignore b/tests/dnn/.gitignore
index d78c5c1aecb9f241c7d78ecc46f6e17abcfa3917..1fcd2410b47494d1cdbd3883d68ce8f0b4bf1a03 100644
--- a/tests/dnn/.gitignore
+++ b/tests/dnn/.gitignore
@@ -3,3 +3,4 @@
 /dnn-layer-maximum-test
 /dnn-layer-pad-test
 /dnn-layer-mathbinary-test
+/dnn-layer-mathunary-test
diff --git a/tests/dnn/Makefile b/tests/dnn/Makefile
index 1f96710821c592811964c63cc11c5caf7ca8a1fc..64591b7851c36c069e7c084ffeff208c811391e7 100644
--- a/tests/dnn/Makefile
+++ b/tests/dnn/Makefile
@@ -3,6 +3,7 @@ DNNTESTPROGS += dnn-layer-conv2d
 DNNTESTPROGS += dnn-layer-depth2space
 DNNTESTPROGS += dnn-layer-mathbinary
 DNNTESTPROGS += dnn-layer-maximum
+DNNTESTPROGS += dnn-layer-mathunary
 
 DNNTESTOBJS  := $(DNNTESTOBJS:%=$(DNNTESTSDIR)%) $(DNNTESTPROGS:%=$(DNNTESTSDIR)/%-test.o)
 DNNTESTPROGS := $(DNNTESTPROGS:%=$(DNNTESTSDIR)/%-test$(EXESUF))
diff --git a/tests/dnn/dnn-layer-mathunary-test.c b/tests/dnn/dnn-layer-mathunary-test.c
new file mode 100644
index 0000000000000000000000000000000000000000..f032ca0684a7556dbaf137b21784cfac0df52820
--- /dev/null
+++ b/tests/dnn/dnn-layer-mathunary-test.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2020
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "libavfilter/dnn/dnn_backend_native_layer_mathunary.h"
+#include "libavutil/avassert.h"
+
+#define EPS 0.00001
+
+static float get_expected(float f, DNNMathUnaryOperation op)
+{
+    switch (op)
+    {
+    case DMUO_ABS:
+        return (f >= 0) ? f : -f;
+    default:
+        av_assert0(!"not supported yet");
+        return 0.f;
+    }
+}
+
+static int test(DNNMathUnaryOperation op)
+{
+    DnnLayerMathUnaryParams params;
+    DnnOperand operands[2];
+    int32_t input_indexes[1];
+    float input[1*1*2*3] = {
+        -3, 2.5, 2, -2.1, 7.8, 100};
+    float *output;
+
+    params.un_op = op;
+
+    operands[0].data = input;
+    operands[0].dims[0] = 1;
+    operands[0].dims[1] = 1;
+    operands[0].dims[2] = 2;
+    operands[0].dims[3] = 3;
+    operands[1].data = NULL;
+
+    input_indexes[0] = 0;
+    dnn_execute_layer_math_unary(operands, input_indexes, 1, &params);
+
+    output = operands[1].data;
+    for (int i = 0; i < sizeof(input) / sizeof(float); ++i) {
+        float expected_output = get_expected(input[i], op);
+        if(fabs(output[i] - expected_output) > EPS) {
+            printf("at index %d, output: %f, expected_output: %f\n", i, output[i], expected_output);
+            av_freep(&output);
+            return 1;
+        }
+    }
+
+    av_freep(&output);
+    return 0;
+}
+
+int main(int agrc, char **argv)
+{
+    if (test(DMUO_ABS))
+        return 1;
+    return 0;
+}
diff --git a/tests/fate/dnn.mak b/tests/fate/dnn.mak
index 5a8e6296a6095cc317b1f9862b83b29d1b096d1a..4a50b1638206f3762cf2a2fa39c694d3641328b6 100644
--- a/tests/fate/dnn.mak
+++ b/tests/fate/dnn.mak
@@ -23,6 +23,11 @@ fate-dnn-layer-maximum: $(DNNTESTSDIR)/dnn-layer-maximum-test$(EXESUF)
 fate-dnn-layer-maximum: CMD = run $(DNNTESTSDIR)/dnn-layer-maximum-test$(EXESUF)
 fate-dnn-layer-maximum: CMP = null
 
+FATE_DNN += fate-dnn-layer-mathunary
+fate-dnn-layer-mathunary: $(DNNTESTSDIR)/dnn-layer-mathunary-test$(EXESUF)
+fate-dnn-layer-mathunary: CMD = run $(DNNTESTSDIR)/dnn-layer-mathunary-test$(EXESUF)
+fate-dnn-layer-mathunary: CMP = null
+
 FATE-yes += $(FATE_DNN)
 
 fate-dnn: $(FATE_DNN)