diff --git a/paddle/fluid/operators/interpolate_op.cu b/paddle/fluid/operators/interpolate_op.cu
index 35177a4e9ade26831f50de84bbb943d856cb98d9..cbffc2fa630fa17f5567e8dc4140787c83c77ed0 100644
--- a/paddle/fluid/operators/interpolate_op.cu
+++ b/paddle/fluid/operators/interpolate_op.cu
@@ -286,7 +286,7 @@ class InterpolateGradOpCUDAKernel : public framework::OpKernel<T> {
     float scale = ctx.Attr<float>("scale");
     if (scale > 0) {
       out_h = in_h * scale;
-      out_w - in_w* scale;
+      out_w = in_w * scale;
     }
     auto out_size = ctx.Input<Tensor>("OutSize");
     if (out_size != nullptr) {
diff --git a/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py b/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py
index 963a17e7d697512e871a97ef24cb1c4ba37a7547..e06c87d969f4c1146f1636a6402059f82341cff3 100644
--- a/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py
+++ b/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py
@@ -305,7 +305,7 @@ class TestBilinearInterpWithMethod3(TestBilinearInterpOp):
 class TestBilinearInterpScale1(TestBilinearInterpOp):
     def init_test_case(self):
         self.interp_method = 'bilinear'
-        self.input_shape = [2, 3, 16, 32]
+        self.input_shape = [2, 3, 5, 7]
         self.out_h = 60
         self.out_w = 25
         self.scale = 2.
@@ -316,7 +316,7 @@ class TestBilinearInterpScale1(TestBilinearInterpOp):
 class TestBilinearInterpScale2(TestBilinearInterpOp):
     def init_test_case(self):
         self.interp_method = 'bilinear'
-        self.input_shape = [2, 3, 16, 32]
+        self.input_shape = [2, 3, 5, 7]
         self.out_h = 60
         self.out_w = 25
         self.scale = 1.
@@ -327,7 +327,7 @@ class TestBilinearInterpScale2(TestBilinearInterpOp):
 class TestBilinearInterpScale3(TestBilinearInterpOp):
     def init_test_case(self):
         self.interp_method = 'bilinear'
-        self.input_shape = [2, 3, 16, 32]
+        self.input_shape = [2, 3, 5, 7]
         self.out_h = 60
         self.out_w = 25
         self.scale = 1.5
diff --git a/python/paddle/fluid/tests/unittests/test_nearest_interp_op.py b/python/paddle/fluid/tests/unittests/test_nearest_interp_op.py
index eb82af75e4a2bf834c010aede79d50b0d73c98bc..1feb2aefda4d18255db13f657a79f0bd05d1b0a3 100644
--- a/python/paddle/fluid/tests/unittests/test_nearest_interp_op.py
+++ b/python/paddle/fluid/tests/unittests/test_nearest_interp_op.py
@@ -259,7 +259,7 @@ class TestNearestInterpWithoutCorners(TestNearestInterpOp):
 class TestNearestNeighborInterpScale1(TestNearestInterpOp):
     def init_test_case(self):
         self.interp_method = 'nearest'
-        self.input_shape = [3, 2, 32, 16]
+        self.input_shape = [3, 2, 7, 5]
         self.out_h = 64
         self.out_w = 32
         self.scale = 2.
@@ -270,7 +270,7 @@ class TestNearestNeighborInterpScale1(TestNearestInterpOp):
 class TestNearestNeighborInterpScale2(TestNearestInterpOp):
     def init_test_case(self):
         self.interp_method = 'nearest'
-        self.input_shape = [3, 2, 32, 16]
+        self.input_shape = [3, 2, 5, 7]
         self.out_h = 64
         self.out_w = 32
         self.scale = 1.5
@@ -281,7 +281,7 @@ class TestNearestNeighborInterpScale2(TestNearestInterpOp):
 class TestNearestNeighborInterpScale3(TestNearestInterpOp):
     def init_test_case(self):
         self.interp_method = 'nearest'
-        self.input_shape = [3, 2, 32, 16]
+        self.input_shape = [3, 2, 7, 5]
         self.out_h = 64
         self.out_w = 32
         self.scale = 1.