diff --git a/Makefile b/Makefile
index 1575b9f..9166cb6 100644
--- a/Makefile
+++ b/Makefile
@@ -7,9 +7,11 @@ MATLAB?=matlab
 OCTAVE?=octave
 
 TESTDIR=$(CURDIR)/tests
+SUPPORTDIR=$(TESTDIR)/support
 ROOTDIR=$(CURDIR)/MOcov
 
 ADDPATH=orig_dir=pwd();cd('$(ROOTDIR)');addpath(pwd);cd(orig_dir)
+ADDSUPPORT=orig_dir=pwd();cd('$(SUPPORTDIR)');addpath(pwd);cd(orig_dir)
 RMPATH=rmpath('$(ROOTDIR)');
 SAVEPATH=savepath();exit(0)
 
@@ -49,7 +51,7 @@ ifdef JUNIT_XML_FILE
 endif
 	
 
-TEST=$(ADDPATH);if(isempty(which('moxunit_runtests'))),error('MOxUnit is required; see https://github.com/MOxUnit/MOxUnit');end;success=moxunit_runtests($(RUNTESTS_ARGS));exit(~success);
+TEST=$(ADDPATH);$(ADDSUPPORT);if(isempty(which('moxunit_runtests'))),error('MOxUnit is required; see https://github.com/MOxUnit/MOxUnit');end;success=moxunit_runtests($(RUNTESTS_ARGS));exit(~success);
 
 MATLAB_BIN=$(shell which $(MATLAB))
 OCTAVE_BIN=$(shell which $(OCTAVE))
diff --git a/tests/support/assertStringContains.m b/tests/support/assertStringContains.m
new file mode 100644
index 0000000..2a4dc21
--- /dev/null
+++ b/tests/support/assertStringContains.m
@@ -0,0 +1,5 @@
+
+function assertStringContains(text, subtext)
+  assert(~isempty(strfind(text, subtext)), ...
+    'String ''%s'' should contain ''%s'', but it doesn''t.');
+end
diff --git a/tests/support/create_tempfile.m b/tests/support/create_tempfile.m
new file mode 100644
index 0000000..152f093
--- /dev/null
+++ b/tests/support/create_tempfile.m
@@ -0,0 +1,13 @@
+function filepath = create_tempfile(filename, contents)
+    % Creates a temporary file with the specified content.
+
+    filepath = ensure_path_in_tempdir(filename);
+
+    % Make sure eventual folder exists
+    tempfolder = fileparts(filepath);
+    create_tempfolder(tempfolder);
+
+    fid = fopen(filepath, 'w');
+    fprintf(fid, contents);
+    fclose(fid);
+end
diff --git a/tests/support/create_tempfolder.m b/tests/support/create_tempfolder.m
new file mode 100644
index 0000000..d788600
--- /dev/null
+++ b/tests/support/create_tempfolder.m
@@ -0,0 +1,11 @@
+function folderpath = create_tempfolder(foldername)
+    % Create a folder inside the default temporary director
+    % and returns it path.
+    %
+    % If the folder already exists, do nothing...
+
+    folderpath = ensure_path_in_tempdir(foldername);
+
+    [unused, unused, unused] = mkdir(folderpath);
+    % Avoid existing folder warnings by receiving all the 3 outputs of mkdir
+end
diff --git a/tests/support/ensure_path_in_tempdir.m b/tests/support/ensure_path_in_tempdir.m
new file mode 100644
index 0000000..867107d
--- /dev/null
+++ b/tests/support/ensure_path_in_tempdir.m
@@ -0,0 +1,14 @@
+function newpath = ensure_path_in_tempdir(oldpath)
+    % Check if path start with the tempdir.
+    % If not, prepend the tempdir to path.
+    %
+    % Returns a path that starts with tempdir.
+
+    len = length(tempdir);
+    if length(oldpath) >= len && strcmp(oldpath(1:len), tempdir)
+        % Just ignore if oldpath already include the tempdir path
+        newpath = oldpath;
+    else
+        newpath = fullfile(tempdir, oldpath);
+    end
+end
diff --git a/tests/test_MOcovMFile_recognizes_classdef_syntax.m b/tests/test_MOcovMFile_recognizes_classdef_syntax.m
index 0cb62ec..a77844e 100644
--- a/tests/test_MOcovMFile_recognizes_classdef_syntax.m
+++ b/tests/test_MOcovMFile_recognizes_classdef_syntax.m
@@ -2,37 +2,6 @@
     initTestSuite;
 end
 
-function folderpath = create_tempfolder(foldername)
-    % Create a folder inside the default temporary director
-    % and returns it path.
-    %
-    % If the folder already exists, do nothing...
-
-    len = length(tempdir);
-    if length(foldername) >= len && strcmp(foldername(1:len), tempdir)
-        % Just ignore if foldername already include the tempdir path
-        folderpath = foldername;
-    else
-        folderpath = fullfile(tempdir, foldername);
-    end
-
-    [unused, unused, unused] = mkdir(folderpath);
-    % Avoid existing folder warnings by receiving all the 3 outputs of mkdir
-end
-
-
-function filepath = create_tempfile(filename, contents)
-    filepath = fullfile(tempdir, filename);
-
-    % Make sure eventual folder exists
-    tempfolder = fileparts(filepath);
-    create_tempfolder(tempfolder);
-
-    fid = fopen(filepath, 'w');
-    fprintf(fid, contents);
-    fclose(fid);
-end
-
 function filepath = create_classdef(classname)
     if nargin < 1
       classname = 'AClass';
@@ -60,11 +29,6 @@
     ]);
 end
 
-function assertStringContains(text, subtext)
-  assert(~isempty(strfind(text, subtext)), ...
-    'String ''%s'' should contain ''%s'', but it doesn''t.');
-end
-
 function test_classdef_line_not_executable
     % Test subject: `MOcovMFile` constructor