diff --git a/tests/checkasm/hevc_add_res.c b/tests/checkasm/hevc_add_res.c
index f35e9fccd9..9dec3705c1 100644
--- a/tests/checkasm/hevc_add_res.c
+++ b/tests/checkasm/hevc_add_res.c
@@ -50,7 +50,7 @@ static void compare_add_res(int size, ptrdiff_t stride, int overflow_test, int m
     LOCAL_ALIGNED_32(uint8_t, dst0, [32 * 32 * 2]);
     LOCAL_ALIGNED_32(uint8_t, dst1, [32 * 32 * 2]);
 
-    declare_func_emms(AV_CPU_FLAG_MMX, void, uint8_t *dst, int16_t *res, ptrdiff_t stride);
+    declare_func_emms(AV_CPU_FLAG_MMX, void, uint8_t *dst, const int16_t *res, ptrdiff_t stride);
 
     randomize_buffers(res0, size);
     randomize_buffers2(dst0, size, mask);
diff --git a/tests/checkasm/hevc_deblock.c b/tests/checkasm/hevc_deblock.c
index 04cf9d87ac..c7f4f7e9ab 100644
--- a/tests/checkasm/hevc_deblock.c
+++ b/tests/checkasm/hevc_deblock.c
@@ -57,7 +57,8 @@ static void check_deblock_chroma(HEVCDSPContext *h, int bit_depth, int c)
     LOCAL_ALIGNED_32(uint8_t, buf0, [BUF_SIZE]);
     LOCAL_ALIGNED_32(uint8_t, buf1, [BUF_SIZE]);
 
-    declare_func(void, uint8_t *pix, ptrdiff_t stride, int32_t *tc, uint8_t *no_p, uint8_t *no_q);
+    declare_func(void, uint8_t *pix, ptrdiff_t stride,
+                 const int32_t *tc, const uint8_t *no_p, const uint8_t *no_q);
 
     if (check_func(c ? h->hevc_h_loop_filter_chroma_c : h->hevc_h_loop_filter_chroma,
                          "hevc_h_loop_filter_chroma%d%s", bit_depth, c ? "_full" : ""))
@@ -226,7 +227,8 @@ static void check_deblock_luma(HEVCDSPContext *h, int bit_depth, int c)
     uint8_t *ptr0 = buf0 + BUF_OFFSET,
             *ptr1 = buf1 + BUF_OFFSET;
 
-    declare_func(void, uint8_t *pix, ptrdiff_t stride, int beta, int32_t *tc, uint8_t *no_p, uint8_t *no_q);
+    declare_func(void, uint8_t *pix, ptrdiff_t stride, int beta,
+                 const int32_t *tc, const uint8_t *no_p, const uint8_t *no_q);
     memset(buf0, 0, BUF_SIZE);
 
     for (int j = 0; j < 3; j++) {
diff --git a/tests/checkasm/hevc_pel.c b/tests/checkasm/hevc_pel.c
index ed22ec4f9d..aebdf104e6 100644
--- a/tests/checkasm/hevc_pel.c
+++ b/tests/checkasm/hevc_pel.c
@@ -88,7 +88,7 @@ static void checkasm_check_hevc_qpel(void)
 
     HEVCDSPContext h;
     int size, bit_depth, i, j;
-    declare_func(void, int16_t *dst, uint8_t *src, ptrdiff_t srcstride,
+    declare_func(void, int16_t *dst, const uint8_t *src, ptrdiff_t srcstride,
                  int height, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -132,7 +132,7 @@ static void checkasm_check_hevc_qpel_uni(void)
 
     HEVCDSPContext h;
     int size, bit_depth, i, j;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
                  int height, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -182,7 +182,7 @@ static void checkasm_check_hevc_qpel_uni_w(void)
     HEVCDSPContext h;
     int size, bit_depth, i, j;
     const int *denom, *wx, *ox;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
                  int height, int denom, int wx, int ox, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -239,8 +239,8 @@ static void checkasm_check_hevc_qpel_bi(void)
 
     HEVCDSPContext h;
     int size, bit_depth, i, j;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
-                 int16_t *src2,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
+                 const int16_t *src2,
                  int height, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -292,8 +292,8 @@ static void checkasm_check_hevc_qpel_bi_w(void)
     HEVCDSPContext h;
     int size, bit_depth, i, j;
     const int *denom, *wx, *ox;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
-                 int16_t *src2,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
+                 const int16_t *src2,
                  int height, int denom, int wx0, int wx1,
                  int ox0, int ox1, intptr_t mx, intptr_t my, int width);
 
@@ -352,7 +352,7 @@ static void checkasm_check_hevc_epel(void)
 
     HEVCDSPContext h;
     int size, bit_depth, i, j;
-    declare_func(void, int16_t *dst, uint8_t *src, ptrdiff_t srcstride,
+    declare_func(void, int16_t *dst, const uint8_t *src, ptrdiff_t srcstride,
                  int height, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -396,7 +396,7 @@ static void checkasm_check_hevc_epel_uni(void)
 
     HEVCDSPContext h;
     int size, bit_depth, i, j;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
                  int height, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -446,7 +446,7 @@ static void checkasm_check_hevc_epel_uni_w(void)
     HEVCDSPContext h;
     int size, bit_depth, i, j;
     const int *denom, *wx, *ox;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
                  int height, int denom, int wx, int ox, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -503,8 +503,8 @@ static void checkasm_check_hevc_epel_bi(void)
 
     HEVCDSPContext h;
     int size, bit_depth, i, j;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
-                 int16_t *src2,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
+                 const int16_t *src2,
                  int height, intptr_t mx, intptr_t my, int width);
 
     for (bit_depth = 8; bit_depth <= 12; bit_depth++) {
@@ -556,8 +556,8 @@ static void checkasm_check_hevc_epel_bi_w(void)
     HEVCDSPContext h;
     int size, bit_depth, i, j;
     const int *denom, *wx, *ox;
-    declare_func(void, uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride,
-                 int16_t *src2,
+    declare_func(void, uint8_t *dst, ptrdiff_t dststride, const uint8_t *src, ptrdiff_t srcstride,
+                 const int16_t *src2,
                  int height, int denom, int wx0, int wx1,
                  int ox0, int ox1, intptr_t mx, intptr_t my, int width);
 
diff --git a/tests/checkasm/hevc_sao.c b/tests/checkasm/hevc_sao.c
index d05af9ac72..21c22b9749 100644
--- a/tests/checkasm/hevc_sao.c
+++ b/tests/checkasm/hevc_sao.c
@@ -78,8 +78,8 @@ static void check_sao_band(HEVCDSPContext *h, int bit_depth)
         int block_size = sao_size[i];
         int prev_size = i > 0 ? sao_size[i - 1] : 0;
         ptrdiff_t stride = PIXEL_STRIDE*SIZEOF_PIXEL;
-        declare_func(void, uint8_t *dst, uint8_t *src, ptrdiff_t dst_stride, ptrdiff_t src_stride,
-                     int16_t *sao_offset_val, int sao_left_class, int width, int height);
+        declare_func(void, uint8_t *dst, const uint8_t *src, ptrdiff_t dst_stride, ptrdiff_t src_stride,
+                     const int16_t *sao_offset_val, int sao_left_class, int width, int height);
 
         if (check_func(h->sao_band_filter[i], "hevc_sao_band_%d_%d", block_size, bit_depth)) {
 
@@ -116,8 +116,8 @@ static void check_sao_edge(HEVCDSPContext *h, int bit_depth)
         int prev_size = i > 0 ? sao_size[i - 1] : 0;
         ptrdiff_t stride = PIXEL_STRIDE*SIZEOF_PIXEL;
         int offset = (AV_INPUT_BUFFER_PADDING_SIZE + PIXEL_STRIDE)*SIZEOF_PIXEL;
-        declare_func(void, uint8_t *dst, uint8_t *src, ptrdiff_t stride_dst,
-                     int16_t *sao_offset_val, int eo, int width, int height);
+        declare_func(void, uint8_t *dst, const uint8_t *src, ptrdiff_t stride_dst,
+                     const int16_t *sao_offset_val, int eo, int width, int height);
 
         for (int w = prev_size + 4; w <= block_size; w += 4) {
             randomize_buffers(src0, src1, BUF_SIZE);
