diff --git a/src/sinol_make/commands/run/__init__.py b/src/sinol_make/commands/run/__init__.py
index 0994bb89..6a01152c 100644
--- a/src/sinol_make/commands/run/__init__.py
+++ b/src/sinol_make/commands/run/__init__.py
@@ -340,17 +340,17 @@ def get_groups(self, tests):
         return sorted(list(set([self.get_group(test) for test in tests])))
 
 
-    def compile_solutions(self, solutions):
+    def compile_solutions(self, solutions, is_checker=False):
         os.makedirs(paths.get_compilation_log_path(), exist_ok=True)
         os.makedirs(paths.get_executables_path(), exist_ok=True)
         print("Compiling %d solutions..." % len(solutions))
-        args = [(solution, True) for solution in solutions]
+        args = [(solution, True, is_checker) for solution in solutions]
         with mp.Pool(self.cpus) as pool:
             compilation_results = pool.starmap(self.compile, args)
         return compilation_results
 
 
-    def compile(self, solution, use_extras = False):
+    def compile(self, solution, use_extras = False, is_checker = False):
         compile_log_file = paths.get_compilation_log_path("%s.compile_log" % package_util.get_file_name(solution))
         source_file = os.path.join(os.getcwd(), "prog", self.get_solution_from_exe(solution))
         output = paths.get_executables_path(package_util.get_executable(solution))
@@ -371,7 +371,7 @@ def compile(self, solution, use_extras = False):
         try:
             with open(compile_log_file, "w") as compile_log:
                 compile.compile(source_file, output, self.compilers, compile_log, self.args.weak_compilation_flags,
-                                extra_compilation_args, extra_compilation_files)
+                                extra_compilation_args, extra_compilation_files, is_checker=is_checker)
             print(util.info("Compilation of file %s was successful."
                             % package_util.get_file_name(solution)))
             return True
@@ -1185,6 +1185,14 @@ def check_errors(self, results: Dict[str, Dict[str, Dict[str, ExecutionResult]]]
         if error_msg != "":
             util.exit_with_error(error_msg)
 
+    def compile_checker(self):
+        checker_basename = os.path.basename(self.checker)
+        self.checker_executable = paths.get_executables_path(checker_basename + ".e")
+
+        checker_compilation = self.compile_solutions([self.checker], is_checker=True)
+        if not checker_compilation[0]:
+            util.exit_with_error('Checker compilation failed.')
+
     def run(self, args):
         util.exit_if_not_package()
 
@@ -1215,12 +1223,7 @@ def run(self, args):
         if len(checker) != 0:
             print(util.info("Checker found: %s" % os.path.basename(checker[0])))
             self.checker = checker[0]
-            checker_basename = os.path.basename(self.checker)
-            self.checker_executable = paths.get_executables_path(checker_basename + ".e")
-
-            checker_compilation = self.compile_solutions([self.checker])
-            if not checker_compilation[0]:
-                util.exit_with_error('Checker compilation failed.')
+            self.compile_checker()
         else:
             self.checker = None
 
diff --git a/src/sinol_make/helpers/cache.py b/src/sinol_make/helpers/cache.py
index 961c6987..6fc5c2c0 100644
--- a/src/sinol_make/helpers/cache.py
+++ b/src/sinol_make/helpers/cache.py
@@ -1,12 +1,13 @@
 import os
 import yaml
+from typing import Union
 
 from sinol_make import util
 from sinol_make.structs.cache_structs import CacheFile
 from sinol_make.helpers import paths
 
 
-def get_cache_file(solution_path: str):
+def get_cache_file(solution_path: str) -> CacheFile:
     """
     Returns content of cache file for given solution
     :param solution_path: Path to solution
@@ -21,7 +22,7 @@ def get_cache_file(solution_path: str):
         return CacheFile()
 
 
-def check_compiled(file_path: str):
+def check_compiled(file_path: str) -> Union[str, None]:
     """
     Check if a file is compiled
     :param file_path: Path to the file
@@ -39,14 +40,22 @@ def check_compiled(file_path: str):
         return None
 
 
-def save_compiled(file_path: str, exe_path: str):
+def save_compiled(file_path: str, exe_path: str, is_checker: bool = False):
     """
     Save the compiled executable path to cache in `.cache/md5sums/<basename of file_path>`,
     which contains the md5sum of the file and the path to the executable.
     :param file_path: Path to the file
     :param exe_path: Path to the compiled executable
+    :param is_checker: Whether the compiled file is a checker. If True, all cached tests are removed.
     """
     info = get_cache_file(file_path)
     info.executable_path = exe_path
     info.md5sum = util.get_file_md5(file_path)
     info.save(file_path)
+
+    if is_checker:
+        for solution in os.listdir(paths.get_cache_path('md5sums')):
+            info = get_cache_file(solution)
+            print(info)
+            info.tests = {}
+            info.save(solution)
diff --git a/src/sinol_make/helpers/compile.py b/src/sinol_make/helpers/compile.py
index 035a20c4..4baea5bf 100644
--- a/src/sinol_make/helpers/compile.py
+++ b/src/sinol_make/helpers/compile.py
@@ -14,7 +14,7 @@
 
 
 def compile(program, output, compilers: Compilers = None, compile_log = None, weak_compilation_flags = False,
-            extra_compilation_args = None, extra_compilation_files = None):
+            extra_compilation_args = None, extra_compilation_files = None, is_checker = False):
     """
     Compile a program.
     :param program: Path to the program to compile
@@ -24,6 +24,7 @@ def compile(program, output, compilers: Compilers = None, compile_log = None, we
     :param weak_compilation_flags: If True, disable all warnings
     :param extra_compilation_args: Extra compilation arguments
     :param extra_compilation_files: Extra compilation files
+    :param is_checker: Set to True if compiling a checker. This will remove all cached test results.
     """
     if extra_compilation_args is None:
         extra_compilation_args = []
@@ -92,7 +93,7 @@ def compile(program, output, compilers: Compilers = None, compile_log = None, we
     if process.returncode != 0:
         raise CompilationError('Compilation failed')
     else:
-        save_compiled(program, output)
+        save_compiled(program, output, is_checker)
         return True
 
 
diff --git a/src/sinol_make/structs/cache_structs.py b/src/sinol_make/structs/cache_structs.py
index 034a230c..5d1f3933 100644
--- a/src/sinol_make/structs/cache_structs.py
+++ b/src/sinol_make/structs/cache_structs.py
@@ -28,7 +28,7 @@ def __init__(self, time_limit=0, memory_limit=0, time_tool="", result=None):
         self.time_tool = time_tool
         self.result = result
 
-    def to_dict(self):
+    def to_dict(self) -> Dict:
         return {
             "time_limit": self.time_limit,
             "memory_limit": self.memory_limit,
@@ -53,7 +53,7 @@ def __init__(self, md5sum="", executable_path="", tests=None):
         self.executable_path = executable_path
         self.tests = tests
 
-    def to_dict(self):
+    def to_dict(self) -> Dict:
         return {
             "md5sum": self.md5sum,
             "executable_path": self.executable_path,
@@ -61,7 +61,7 @@ def to_dict(self):
         }
 
     @staticmethod
-    def from_dict(dict):
+    def from_dict(dict) -> 'CacheFile':
         return CacheFile(
             md5sum=dict.get("md5sum", ""),
             executable_path=dict.get("executable_path", ""),