diff --git a/core/input/input_builders.py b/core/input/input_builders.py
index eabdefe5436..ae848f4e7cd 100644
--- a/core/input/input_builders.py
+++ b/core/input/input_builders.py
@@ -13,7 +13,7 @@ def make_default_controller_mappings(target, source, env):
         # ensure mappings have a consistent order
         platform_mappings: dict = OrderedDict()
         for src_path in source:
-            with open(str(src_path), "r") as f:
+            with open(str(src_path), "r", encoding="utf-8") as f:
                 # read mapping file and skip header
                 mapping_file_lines = f.readlines()[2:]
 
diff --git a/gles3_builders.py b/gles3_builders.py
index 985e9d547ce..cf7c74f32d8 100644
--- a/gles3_builders.py
+++ b/gles3_builders.py
@@ -31,7 +31,7 @@ class GLES3HeaderStruct:
 
 
 def include_file_in_gles3_header(filename: str, header_data: GLES3HeaderStruct, depth: int):
-    with open(filename, "r") as fs:
+    with open(filename, "r", encoding="utf-8") as fs:
         line = fs.readline()
 
         while line:
diff --git a/glsl_builders.py b/glsl_builders.py
index fd90e9a6c0a..5a17e3ca7f9 100644
--- a/glsl_builders.py
+++ b/glsl_builders.py
@@ -38,7 +38,7 @@ class RDHeaderStruct:
 
 
 def include_file_in_rd_header(filename: str, header_data: RDHeaderStruct, depth: int) -> RDHeaderStruct:
-    with open(filename, "r") as fs:
+    with open(filename, "r", encoding="utf-8") as fs:
         line = fs.readline()
 
         while line:
@@ -172,7 +172,7 @@ class RAWHeaderStruct:
 
 
 def include_file_in_raw_header(filename: str, header_data: RAWHeaderStruct, depth: int) -> None:
-    with open(filename, "r") as fs:
+    with open(filename, "r", encoding="utf-8") as fs:
         line = fs.readline()
 
         while line:
diff --git a/methods.py b/methods.py
index 5aa34888eb0..c0d129f93ed 100644
--- a/methods.py
+++ b/methods.py
@@ -179,7 +179,7 @@ def get_version_info(module_version_string="", silent=False):
     gitfolder = ".git"
 
     if os.path.isfile(".git"):
-        with open(".git", "r") as file:
+        with open(".git", "r", encoding="utf-8") as file:
             module_folder = file.readline().strip()
         if module_folder.startswith("gitdir: "):
             gitfolder = module_folder[8:]
@@ -196,12 +196,12 @@ def get_version_info(module_version_string="", silent=False):
             head = os.path.join(gitfolder, ref)
             packedrefs = os.path.join(gitfolder, "packed-refs")
             if os.path.isfile(head):
-                with open(head, "r") as file:
+                with open(head, "r", encoding="utf-8") as file:
                     githash = file.readline().strip()
             elif os.path.isfile(packedrefs):
                 # Git may pack refs into a single file. This code searches .git/packed-refs file for the current ref's hash.
                 # https://mirrors.edge.kernel.org/pub/software/scm/git/docs/git-pack-refs.html
-                for line in open(packedrefs, "r").read().splitlines():
+                for line in open(packedrefs, "r", encoding="utf-8").read().splitlines():
                     if line.startswith("#"):
                         continue
                     (line_hash, line_ref) = line.split(" ")
@@ -270,7 +270,7 @@ const uint64_t VERSION_TIMESTAMP = {git_timestamp};
 
 
 def parse_cg_file(fname, uniforms, sizes, conditionals):
-    with open(fname, "r") as fs:
+    with open(fname, "r", encoding="utf-8") as fs:
         line = fs.readline()
 
         while line:
@@ -1243,7 +1243,7 @@ def generate_vs_project(env, original_args, project_name="godot"):
     ).hexdigest()
 
     if os.path.exists(f"{project_name}.vcxproj.filters"):
-        with open(f"{project_name}.vcxproj.filters", "r") as file:
+        with open(f"{project_name}.vcxproj.filters", "r", encoding="utf-8") as file:
             existing_filters = file.read()
         match = re.search(r"(?ms)^<!-- CHECKSUM$.([0-9a-f]{32})", existing_filters)
         if match is not None and md5 == match.group(1):
@@ -1255,7 +1255,7 @@ def generate_vs_project(env, original_args, project_name="godot"):
     if not skip_filters:
         print(f"Regenerating {project_name}.vcxproj.filters")
 
-        with open("misc/msvs/vcxproj.filters.template", "r") as file:
+        with open("misc/msvs/vcxproj.filters.template", "r", encoding="utf-8") as file:
             filters_template = file.read()
         for i in range(1, 10):
             filters_template = filters_template.replace(f"%%UUID{i}%%", str(uuid.uuid4()))
@@ -1409,7 +1409,7 @@ def generate_vs_project(env, original_args, project_name="godot"):
             )
         output = f'bin\\godot{env["PROGSUFFIX"]}'
 
-        with open("misc/msvs/props.template", "r") as file:
+        with open("misc/msvs/props.template", "r", encoding="utf-8") as file:
             props_template = file.read()
 
         props_template = props_template.replace("%%VSCONF%%", vsconf)
@@ -1478,7 +1478,7 @@ def generate_vs_project(env, original_args, project_name="godot"):
     sln_uuid = str(uuid.uuid4())
 
     if os.path.exists(f"{project_name}.sln"):
-        for line in open(f"{project_name}.sln", "r").read().splitlines():
+        for line in open(f"{project_name}.sln", "r", encoding="utf-8").read().splitlines():
             if line.startswith('Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}")'):
                 proj_uuid = re.search(
                     r"\"{(\b[0-9a-fA-F]{8}\b-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-\b[0-9a-fA-F]{12}\b)}\"$",
@@ -1567,7 +1567,7 @@ def generate_vs_project(env, original_args, project_name="godot"):
     section2 = sorted(section2)
 
     if not get_bool(original_args, "vsproj_props_only", False):
-        with open("misc/msvs/vcxproj.template", "r") as file:
+        with open("misc/msvs/vcxproj.template", "r", encoding="utf-8") as file:
             proj_template = file.read()
         proj_template = proj_template.replace("%%UUID%%", proj_uuid)
         proj_template = proj_template.replace("%%CONFS%%", "\n    ".join(configurations))
@@ -1579,7 +1579,7 @@ def generate_vs_project(env, original_args, project_name="godot"):
             f.write(proj_template)
 
     if not get_bool(original_args, "vsproj_props_only", False):
-        with open("misc/msvs/sln.template", "r") as file:
+        with open("misc/msvs/sln.template", "r", encoding="utf-8") as file:
             sln_template = file.read()
         sln_template = sln_template.replace("%%NAME%%", project_name)
         sln_template = sln_template.replace("%%UUID%%", proj_uuid)
diff --git a/misc/scripts/check_ci_log.py b/misc/scripts/check_ci_log.py
index d979d373de1..d024a3e375a 100755
--- a/misc/scripts/check_ci_log.py
+++ b/misc/scripts/check_ci_log.py
@@ -9,7 +9,7 @@ if len(sys.argv) < 2:
 
 fname = sys.argv[1]
 
-with open(fname.strip(), "r") as fileread:
+with open(fname.strip(), "r", encoding="utf-8") as fileread:
     file_contents = fileread.read()
 
 # If find "ERROR: AddressSanitizer:", then happens invalid read or write
diff --git a/misc/scripts/copyright_headers.py b/misc/scripts/copyright_headers.py
index 82a4477cc09..169795921fd 100755
--- a/misc/scripts/copyright_headers.py
+++ b/misc/scripts/copyright_headers.py
@@ -69,7 +69,7 @@ for f in sys.argv[1:]:
     # In a second pass, we skip all consecutive comment lines starting with "/*",
     # then we can append the rest (step 2).
 
-    with open(fname.strip(), "r") as fileread:
+    with open(fname.strip(), "r", encoding="utf-8") as fileread:
         line = fileread.readline()
         header_done = False
 
diff --git a/modules/raycast/godot_update_embree.py b/modules/raycast/godot_update_embree.py
index 0e62824adcd..f7af937c8b7 100644
--- a/modules/raycast/godot_update_embree.py
+++ b/modules/raycast/godot_update_embree.py
@@ -187,7 +187,7 @@ with open(os.path.join(dest_dir, "kernels/config.h"), "w", encoding="utf-8", new
     )
 
 
-with open("CMakeLists.txt", "r") as cmake_file:
+with open("CMakeLists.txt", "r", encoding="utf-8") as cmake_file:
     cmake_content = cmake_file.read()
     major_version = int(re.compile(r"EMBREE_VERSION_MAJOR\s(\d+)").findall(cmake_content)[0])
     minor_version = int(re.compile(r"EMBREE_VERSION_MINOR\s(\d+)").findall(cmake_content)[0])
diff --git a/tests/create_test.py b/tests/create_test.py
index 4d1f1d656e1..deb53aca20b 100644
--- a/tests/create_test.py
+++ b/tests/create_test.py
@@ -101,7 +101,7 @@ TEST_CASE("[{name_pascal_case}] Example test case") {{
 
     if args.invasive:
         print("Trying to insert include directive in test_main.cpp...")
-        with open("test_main.cpp", "r") as file:
+        with open("test_main.cpp", "r", encoding="utf-8") as file:
             contents = file.read()
         match = re.search(r'#include "tests.*\n', contents)
 
diff --git a/tests/python_build/test_gles3_builder.py b/tests/python_build/test_gles3_builder.py
index 861e0b84c43..6f16139eb97 100644
--- a/tests/python_build/test_gles3_builder.py
+++ b/tests/python_build/test_gles3_builder.py
@@ -17,15 +17,15 @@ def test_gles3_builder(shader_files, builder, header_struct):
 
     builder(shader_files["path_input"], "drivers/gles3/shader_gles3.h", "GLES3", header_data=header)
 
-    with open(shader_files["path_expected_parts"], "r") as f:
+    with open(shader_files["path_expected_parts"], "r", encoding="utf-8") as f:
         expected_parts = json.load(f)
         assert expected_parts == header.__dict__
 
-    with open(shader_files["path_output"], "r") as f:
+    with open(shader_files["path_output"], "r", encoding="utf-8") as f:
         actual_output = f.read()
         assert actual_output
 
-    with open(shader_files["path_expected_full"], "r") as f:
+    with open(shader_files["path_expected_full"], "r", encoding="utf-8") as f:
         expected_output = f.read()
 
     assert actual_output == expected_output
diff --git a/tests/python_build/test_glsl_builder.py b/tests/python_build/test_glsl_builder.py
index b9dcef48ac1..348ef8441cd 100644
--- a/tests/python_build/test_glsl_builder.py
+++ b/tests/python_build/test_glsl_builder.py
@@ -23,15 +23,15 @@ def test_glsl_builder(shader_files, builder, header_struct):
     header = header_struct()
     builder(shader_files["path_input"], header_data=header)
 
-    with open(shader_files["path_expected_parts"], "r") as f:
+    with open(shader_files["path_expected_parts"], "r", encoding="utf-8") as f:
         expected_parts = json.load(f)
         assert expected_parts == header.__dict__
 
-    with open(shader_files["path_output"], "r") as f:
+    with open(shader_files["path_output"], "r", encoding="utf-8") as f:
         actual_output = f.read()
         assert actual_output
 
-    with open(shader_files["path_expected_full"], "r") as f:
+    with open(shader_files["path_expected_full"], "r", encoding="utf-8") as f:
         expected_output = f.read()
 
     assert actual_output == expected_output