diff --git a/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim.params.yaml b/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim.params.yaml
index 92bcd9723b5f0c83a9d581393a3a3c3aee657ba3..9af2709ce6b0ebd13b4a014d07f717f374fb678e 100644
--- a/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim.params.yaml
+++ b/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim.params.yaml
@@ -29,13 +29,13 @@ cases:
   - { src_type: byte, src_val: 127, dst_type: double, dst_val: 127.0 }
   - { src_type: byte, src_val: -128, dst_type: double, dst_val: -128.0 }
 
-  - { src_type: char, src_val: 0, dst_type: int, dst_val: 0 }
+  - { src_type: char, src_val: Int.toChar(0), dst_type: int, dst_val: 0 }
   - { src_type: char, src_val: "c'\\uFFFF'", dst_type: int, dst_val: 0x0000FFFF }
-  - { src_type: char, src_val: 0, dst_type: long, dst_val: 0 }
+  - { src_type: char, src_val: Int.toChar(0), dst_type: long, dst_val: 0 }
   - { src_type: char, src_val: "c'\\uFFFF'", dst_type: long, dst_val: 0x000000000000FFFF }
-  - { src_type: char, src_val: 0, dst_type: float, dst_val: 0.0 }
+  - { src_type: char, src_val: Int.toChar(0), dst_type: float, dst_val: 0.0 }
   - { src_type: char, src_val: "c'\\uFFFF'", dst_type: float, dst_val: 65535.0 }
-  - { src_type: char, src_val: 0, dst_type: double, dst_val: 0.0 }
+  - { src_type: char, src_val: Int.toChar(0), dst_type: double, dst_val: 0.0 }
   - { src_type: char, src_val: "c'\\uFFFF'", dst_type: double, dst_val: 65535.0 }
 
   - { src_type: short, src_val: 0, dst_type: int, dst_val: 0 }
diff --git a/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim_call.params.yaml b/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim_call.params.yaml
index 5edbe4c56ab0f915583a1344afa139c6c37c05e2..217161867b3015a1e18eb49eb7cf03a29f5204f5 100644
--- a/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim_call.params.yaml
+++ b/static_core/plugins/ets/tests/ets-templates/06.contexts_and_conversions/02.assignment-like_contexts/widening_prim_call.params.yaml
@@ -24,7 +24,7 @@ cases:
       - { type: byte, val: 0, val2: 0 }
       - { type: byte, val: 127, val2: 127 }
       - { type: byte, val: -128, val2: -128 }
-      - { type: char, val: 0, val2: 0 }
+      - { type: char, val: Int.toChar(0), val2: 0 }
       - { type: char, val: "c'\\uFFFF'", val2: 0x0000FFFF }
       - { type: short, val: 0, val2: 0 }
       - { type: short, val: 32_767, val2: 32_767 }
@@ -35,7 +35,7 @@ cases:
       - { type: byte, val: 0, val2: ((0).toLong())}
       - { type: byte, val: 127, val2: ((127).toLong()) }
       - { type: byte, val: -128, val2: ((-128).toLong()) }
-      - { type: char, val: 0, val2: ((0).toLong()) }
+      - { type: char, val: Int.toChar(0), val2: ((0).toLong()) }
       - { type: char, val: "c'\\uFFFF'", val2: ((0x000000000000FFFF).toLong()) }
       - { type: short, val: 0, val2: ((0).toLong()) }
       - { type: short, val: 32_767, val2: ((32_767).toLong()) }
@@ -49,7 +49,7 @@ cases:
       - { type: byte, val: 0, val2: (0.0f) }
       - { type: byte, val: 127, val2: (127.0f) }
       - { type: byte, val: -128, val2: (-128.0f) }
-      - { type: char, val: 0, val2: (0.0f) }
+      - { type: char, val: Int.toChar(0), val2: (0.0f) }
       - { type: char, val: "c'\\uFFFF'", val2: (65535.0f)}
       - { type: short, val: 0, val2: (0.0f) }
       - { type: short, val: 32_767, val2: (32_767.0f) }
@@ -66,7 +66,7 @@ cases:
       - { type: byte, val: 0, val2: 0.0 }
       - { type: byte, val: 127, val2: 127.0 }
       - { type: byte, val: -128, val2: -128.0 }
-      - { type: char, val: 0, val2: 0.0 }
+      - { type: char, val: Int.toChar(0), val2: 0.0 }
       - { type: char, val: "c'\\uFAFF'", val2: 64255.0 }
       - { type: short, val: 0, val2: 0.0 }
       - { type: short, val: 32_767, val2: 32_767.0 }
diff --git a/static_core/plugins/ets/tests/ets-templates/09.classes/02.class_extension_clause/method_return_value/method_return_value_20.ets b/static_core/plugins/ets/tests/ets-templates/09.classes/02.class_extension_clause/method_return_value/method_return_value_20.ets
index 479e9e21131716b0fae95b7e1ddf5d9032e6c0c5..858f11ebce35cb4100219e28acac42bed61fd9a5 100755
--- a/static_core/plugins/ets/tests/ets-templates/09.classes/02.class_extension_clause/method_return_value/method_return_value_20.ets
+++ b/static_core/plugins/ets/tests/ets-templates/09.classes/02.class_extension_clause/method_return_value/method_return_value_20.ets
@@ -20,7 +20,7 @@ name: method_return_value_20
 
 class Parent {
     public getValue(): char {
-        return 100;
+        return Int.toChar(100);
     }
 }