diff --git a/calculate/templates/template_engine.py b/calculate/templates/template_engine.py
index c957ccf..8e81f6f 100644
--- a/calculate/templates/template_engine.py
+++ b/calculate/templates/template_engine.py
@@ -838,6 +838,10 @@ class CalculateExtension(Extension):
         self.parameters_processor = parameters_processor
         self.template_type = DIR
 
+        # Флаг, указывающий, что тег calculate уже был разобран. Нужен для
+        # того, чтобы проверять единственность тега calculate.
+        self.calculate_parsed = False
+
         self.tags = {'calculate', 'save', 'set_var'}
         self.CONDITION_TOKENS_TYPES = {'eq', 'ne', 'lt', 'gt', 'lteq', 'gteq'}
         self.LITERAL_TOKENS_TYPES = {'string', 'integer', 'float'}
@@ -908,10 +912,15 @@ class CalculateExtension(Extension):
     def parse_calculate(self):
         '''Метод для разбора тега calculate, содержащего значения параметров и
         условия выполнения шаблона.'''
-        expect_comma_flag = False
-
         lineno = next(self.stream).lineno
 
+        if self.calculate_parsed:
+            raise TemplateSyntaxError(
+                                   "template can only have one calculate tag.",
+                                   lineno=lineno)
+
+        expect_comma_flag = False
+
         while self.stream.current.type != 'block_end':
             if expect_comma_flag:
                 self.stream.expect('comma')
@@ -967,6 +976,7 @@ class CalculateExtension(Extension):
         #                              lineno=lineno)
         # return nodes.Output([save_node], lineno=lineno)
 
+        self.calculate_parsed = True
         return nodes.Output([nodes.Const('')], lineno=lineno)
 
     def _is_variable_name(self, token):
@@ -1396,6 +1406,7 @@ class TemplateEngine:
             self._parameters_object
 
         self.calculate_extension.template_type = template_type
+        self.calculate_extension.calculate_parsed = False
 
         template = self.environment.get_template(template_path)
         self.parameters_processor.check_postparse_parameters()
@@ -1423,6 +1434,7 @@ class TemplateEngine:
             self._parameters_object
 
         self.calculate_extension.template_type = template_type
+        self.calculate_extension.calculate_parsed = False
 
         template = self.environment.from_string(string)
         self.parameters_processor.check_postparse_parameters()
diff --git a/tests/templates/test_template_engine.py b/tests/templates/test_template_engine.py
index f2d5552..425d712 100644
--- a/tests/templates/test_template_engine.py
+++ b/tests/templates/test_template_engine.py
@@ -1,7 +1,8 @@
 import os
 import pytest
 from calculate.templates.template_engine import TemplateEngine, Variables,\
-                                                ConditionFailed, DIR, FILE
+                                                ConditionFailed, DIR, FILE,\
+                                                TemplateSyntaxError
 from calculate.templates.template_processor import TemplateExecutor
 
 
@@ -25,6 +26,14 @@ class TestTemplateEngine():
                 output_parameters.path == '/etc/path' and
                 output_parameters.force)
 
+    def test_if_an_input_template_contains_more_than_one_calculate_tag__the_template_engine_raises_the_TemplateSyntaxError_exception(self):
+        input_template = '''{% calculate name = 'filename' %}
+                            {% calculate path = '/etc/path'%}
+                            {% calculate force %}'''
+        template_engine = TemplateEngine(appends_set=APPENDS_SET)
+        with pytest.raises(TemplateSyntaxError):
+            template_engine.process_template_from_string(input_template, DIR)
+
     def test_if_an_input_template_binded_with_datavars_module__variables_available_in_a_template(self):
         input_template = '''{% calculate name = vars.var_1, path = vars.var_2, autoupdate %}'''
         datavars_module = Variables({'vars':
@@ -71,10 +80,8 @@ class TestTemplateEngine():
             pytest.fail('Unexpected ConditionFailed exception.')
 
     def test_if_an_input_template_contains_several_conditions_and_it_is_False__the_template_engine_raises_ConditionFailed_exception(self):
-        input_template = '''{% calculate name = vars.var_1 %}
-                            {% calculate env = 'other_vars'%}
-                            {% calculate var_4 < var_5 %}
-                            {% calculate path = var_3, var_6 == 'value' %}'''
+        input_template = '''{% calculate name = vars.var_1, env = 'other_vars',
+                            var_4 < var_5, path = var_3, var_6 == 'value' %}'''
 
         datavars_module = Variables({'vars':
                                      Variables({'var_1': 'filename',
@@ -90,10 +97,9 @@ class TestTemplateEngine():
             template_engine.process_template_from_string(input_template, DIR)
 
     def test_if_an_input_template_contains_several_calculate_tags__the_template_engine_will_parse_them_all_and_will_contain_all_parameters_and_result_of_all_conditions(self):
-        input_template = '''{% calculate name = vars.var_1 %}
-                            {% calculate env = 'other_vars, vars' %}
-                            {% calculate var_4 > var_5 %}
-                            {% calculate path = var_3, var_6 == 'value' %}'''
+        input_template = '''{% calculate name = vars.var_1,
+                            env = 'other_vars, vars', var_4 > var_5,
+                            path = var_3, var_6 == 'value' %}'''
         datavars_module = Variables({'vars':
                                      Variables({'var_1': 'filename',
                                                 'var_2': '/etc/path'}),
@@ -111,9 +117,9 @@ class TestTemplateEngine():
                 output_parameters.env == {'other_vars', 'vars'})
 
     def test_if_an_input_template_contains_variables_in_its_text__the_rendered_text_will_contain_values_of_this_variables(self):
-        input_template = '''{% calculate name = 'filename', force -%}
+        input_template = '''{% calculate name = 'filename', force,
+        env = 'vars_1' -%}
         parameter_1 = {{ vars_2.var_3 }}
-        {% calculate env = 'vars_1' -%}
         parameter_2 = {{ vars_2.var_4 }}
         parameter_3 = {{ var_1 }}'''
         output_text = '''parameter_1 = value_1
@@ -193,8 +199,7 @@ class TestTemplateEngine():
 
     def test_if_an_input_template_calculate_tag_contains_pkg_function_with_an_existing_package_in_its_argument__the_pkg_function_returns_version_value_of_the_package_from_package_parameter_without_any_exceptions(self):
         input_template = '''{% calculate name = 'filename',
-        package='test-category/test-package', force -%}
-        {% calculate pkg() < 2.7 -%}'''
+        package='test-category/test-package', force, pkg() < 2.7 -%}'''
 
         try:
             template_engine = TemplateEngine(appends_set=APPENDS_SET,
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_10/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_10/root/.calculate_directory
index c9154f6..7fd928f 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_10/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_10/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', action = 'install', package = 'test-category/new-package' %}
-{% calculate autoupdate %}
+{% calculate append = 'skip', action = 'install',
+package = 'test-category/new-package', autoupdate %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_11/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_11/root/.calculate_directory
index e82b02e..763f36b 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_11/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_11/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', package = 'test-category/test-package',
+path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_12/root_0/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_12/root_0/.calculate_directory
index a07d12b..7b1b0d6 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_12/root_0/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_12/root_0/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', package = 'test-category/test-package' %}
-{% calculate action = 'install' %}
+{% calculate append = 'skip', package = 'test-category/test-package',
+action = 'install' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_12/root_1/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_12/root_1/.calculate_directory
index 22931ca..8de024c 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_12/root_1/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_12/root_1/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', package = 'test-category/test-package' %}
-{% calculate action = 'update' %}
+{% calculate append = 'skip', package = 'test-category/test-package',
+action = 'update' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_2/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_2/root/.calculate_directory
index e60987e..78e1164 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_2/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_2/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', action = 'install', package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', action = 'install',
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_21/root/dir_22/dir_21/file_0 b/tests/templates/testfiles/test_dir_processor_root/templates_21/root/dir_22/dir_21/file_0
index a549fd6..d93686e 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_21/root/dir_22/dir_21/file_0
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_21/root/dir_22/dir_21/file_0
@@ -1,5 +1,5 @@
-{% calculate append = 'join', format = 'bind' %}
-{% calculate merge = 'test-category/test-package, test-category/new-package' -%}
+{% calculate append = 'join', format = 'bind',
+merge = 'test-category/test-package, test-category/new-package' -%}
 options {
     parameter-1 {{ variables.variable_1 }};
     parameter-2 {{ variables.variable_2 }};
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_24/dir_24/file_0 b/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_24/dir_24/file_0
index 7115ab4..bac0e41 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_24/dir_24/file_0
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_24/dir_24/file_0
@@ -1,5 +1,5 @@
-{% calculate append = 'join', format = 'bind' %}
-{% calculate merge = 'test-category/new-package' -%}
+{% calculate append = 'join', format = 'bind',
+merge = 'test-category/new-package' -%}
 options {
     parameter-1 {{ variables.variable_1 }};
     parameter-2 {{ variables.variable_2 }};
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_26/file_0 b/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_26/file_0
index dd43f07..2de7914 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_26/file_0
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_22/root/dir_26/file_0
@@ -1,5 +1,5 @@
-{% calculate append = 'join', format = 'bind' -%}
-{% calculate merge = 'test-category/test-package' -%}
+{% calculate append = 'join', format = 'bind',
+merge = 'test-category/test-package' -%}
 options {
     parameter-1 {{ variables.variable_1 }};
     parameter-2 {{ variables.variable_2 }};
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_23/root/dir_27/dir_28/file_0 b/tests/templates/testfiles/test_dir_processor_root/templates_23/root/dir_27/dir_28/file_0
index 8d0c697..083f103 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_23/root/dir_27/dir_28/file_0
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_23/root/dir_27/dir_28/file_0
@@ -1,5 +1,5 @@
-{% calculate append = 'join', format = 'bind' %}
-{% calculate merge = 'test-category/test-package' %}
+{% calculate append = 'join', format = 'bind',
+merge = 'test-category/test-package' %}
 options {
     parameter-1 {{ variables.variable_1 }};
     parameter-2 {{ variables.variable_2 }};
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_23/root/file_9 b/tests/templates/testfiles/test_dir_processor_root/templates_23/root/file_9
index 449a488..ece3ae3 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_23/root/file_9
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_23/root/file_9
@@ -1,5 +1,5 @@
-{% calculate append = 'join', format = 'bind' -%}
-{% calculate package = 'test-category/test-package' -%}
+{% calculate append = 'join', format = 'bind',
+package = 'test-category/test-package' -%}
 options {
     parameter-1 {{ variables.variable_1 }};
     parameter-2 {{ variables.variable_2 }};
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_24/root/file_10 b/tests/templates/testfiles/test_dir_processor_root/templates_24/root/file_10
index 8ac874d..0b3aca5 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_24/root/file_10
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_24/root/file_10
@@ -1,5 +1,5 @@
-{% calculate append = 'join', format = 'bind', path = '/etc' -%}
-{% calculate install.number > 100 -%}
+{% calculate append = 'join', format = 'bind', path = '/etc',
+install.number > 100 -%}
 options {
     parameter-1 {{ variables.variable_1 }};
     parameter-2 {{ variables.variable_2 }};
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_26/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_26/root/.calculate_directory
index e60987e..78e1164 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_26/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_26/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', action = 'install', package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', action = 'install',
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_3/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_3/root/.calculate_directory
index e60987e..78e1164 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_3/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_3/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', action = 'install', package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', action = 'install',
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_32/install/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_32/install/.calculate_directory
index 969b628..78e1164 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_32/install/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_32/install/.calculate_directory
@@ -1,3 +1,2 @@
 {% calculate append = 'skip', action = 'install',
-package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_32/update/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_32/update/.calculate_directory
index 2c74513..5abe2f1 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_32/update/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_32/update/.calculate_directory
@@ -1,3 +1,2 @@
 {% calculate append = 'skip', action = 'update',
-package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_33/install/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_33/install/.calculate_directory
index da1e1b6..3c0eee1 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_33/install/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_33/install/.calculate_directory
@@ -1,2 +1 @@
-{% calculate append = 'skip', action = 'install' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', action = 'install', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_33/update/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_33/update/.calculate_directory
index 2c74513..5abe2f1 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_33/update/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_33/update/.calculate_directory
@@ -1,3 +1,2 @@
 {% calculate append = 'skip', action = 'update',
-package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_4/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_4/root/.calculate_directory
index e60987e..78e1164 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_4/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_4/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', action = 'install', package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', action = 'install',
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_5/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_5/root/.calculate_directory
index e60987e..78e1164 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_5/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_5/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', action = 'install', package = 'test-category/test-package' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', action = 'install',
+package = 'test-category/test-package', path = '/etc' %}
diff --git a/tests/templates/testfiles/test_dir_processor_root/templates_7/root/.calculate_directory b/tests/templates/testfiles/test_dir_processor_root/templates_7/root/.calculate_directory
index 8cd0bf5..daf19be 100644
--- a/tests/templates/testfiles/test_dir_processor_root/templates_7/root/.calculate_directory
+++ b/tests/templates/testfiles/test_dir_processor_root/templates_7/root/.calculate_directory
@@ -1,2 +1,2 @@
-{% calculate append = 'skip', action = 'install', package = 'test-category/new-package' %}
-{% calculate path = '/etc' %}
+{% calculate append = 'skip', action = 'install',
+package = 'test-category/new-package', path = '/etc' %}