diff --git a/src/modules/configuration/core/application/services/configurations-manager.service.ts b/src/modules/configuration/core/application/services/configurations-manager.service.ts
index 5dd7990..01d9b6b 100644
--- a/src/modules/configuration/core/application/services/configurations-manager.service.ts
+++ b/src/modules/configuration/core/application/services/configurations-manager.service.ts
@@ -87,7 +87,6 @@ export class ConfigurationsManagerService {
     for (key in configuration) {
       if (key !== 'domain' && key === property) return configuration[key];
     }
-    throw new NotFoundException('Configuration item not found');
   };
 
   private _isInt = (number: number): boolean => number % 1 === 0;
diff --git a/src/modules/configuration/interface/grpc-controllers/dtos/is-configuration-type.decorator.ts b/src/modules/configuration/interface/grpc-controllers/dtos/is-configuration-type.decorator.ts
deleted file mode 100644
index 71e9b1c..0000000
--- a/src/modules/configuration/interface/grpc-controllers/dtos/is-configuration-type.decorator.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import { ValidateBy, ValidationOptions, buildMessage } from 'class-validator';
-
-export const IsConfigurationType = (
-  validationOptions?: ValidationOptions,
-): PropertyDecorator =>
-  ValidateBy(
-    {
-      name: '',
-      constraints: [],
-      validator: {
-        validate: (value: any): boolean =>
-          typeof value === 'number' ||
-          typeof value === 'boolean' ||
-          typeof value === 'string',
-        defaultMessage: buildMessage(
-          () => `Value must be a number, boolean or string`,
-          validationOptions,
-        ),
-      },
-    },
-    validationOptions,
-  );
diff --git a/src/modules/configuration/interface/grpc-controllers/dtos/set-configuration.request.dto.ts b/src/modules/configuration/interface/grpc-controllers/dtos/set-configuration.request.dto.ts
index 12285b7..2c494ad 100644
--- a/src/modules/configuration/interface/grpc-controllers/dtos/set-configuration.request.dto.ts
+++ b/src/modules/configuration/interface/grpc-controllers/dtos/set-configuration.request.dto.ts
@@ -1,6 +1,5 @@
 import { ConfigurationDomain } from '@mobicoop/configuration-module';
 import { IsEnum, IsNotEmpty, IsString } from 'class-validator';
-import { IsConfigurationType } from './is-configuration-type.decorator';
 
 export class SetConfigurationRequestDto {
   @IsEnum(ConfigurationDomain)
@@ -11,7 +10,6 @@ export class SetConfigurationRequestDto {
   @IsNotEmpty()
   key: string;
 
-  @IsConfigurationType()
   @IsNotEmpty()
   value: string | boolean | number;
 }
diff --git a/src/modules/configuration/tests/unit/core/configurations-manager.service.spec.ts b/src/modules/configuration/tests/unit/core/configurations-manager.service.spec.ts
new file mode 100644
index 0000000..f5c4cbe
--- /dev/null
+++ b/src/modules/configuration/tests/unit/core/configurations-manager.service.spec.ts
@@ -0,0 +1,125 @@
+import {
+  ConfigurationDomain,
+  ConfigurationIdentifier,
+  ConfigurationType,
+} from '@mobicoop/configuration-module';
+import { NotFoundException } from '@mobicoop/ddd-library';
+import { ConfigurationsManagerService } from '@modules/configuration/core/application/services/configurations-manager.service';
+import { ConfigService } from '@nestjs/config';
+import { Test, TestingModule } from '@nestjs/testing';
+import { Config } from '@src/config/config';
+
+const mockConfigService = {
+  get: jest.fn().mockImplementation((domain: string) => {
+    switch (domain) {
+      case 'carpool':
+        return {
+          departureTimeMargin: 900,
+          role: 'passenger',
+          seatsProposed: 3,
+          seatsRequested: 1,
+          strictFrequency: false,
+        };
+      case 'pagination':
+        return {
+          perPage: 10,
+        };
+    }
+  }),
+};
+
+describe('Configurations Manager Service', () => {
+  let configurationsManagerService: ConfigurationsManagerService;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        {
+          provide: ConfigService,
+          useValue: mockConfigService,
+        },
+        ConfigurationsManagerService,
+      ],
+    }).compile();
+
+    configurationsManagerService = module.get<ConfigurationsManagerService>(
+      ConfigurationsManagerService,
+    );
+  });
+
+  it('should be defined', () => {
+    expect(configurationsManagerService).toBeDefined();
+  });
+
+  it('should return the list of configuration elements', () => {
+    const list: Config[] = configurationsManagerService.list();
+    expect(list).toHaveLength(2);
+  });
+
+  describe('identifierType', () => {
+    it('should return the type of a configuration item for a given identifier', () => {
+      const configurationIdentifier: ConfigurationIdentifier = {
+        domain: ConfigurationDomain.CARPOOL,
+        key: 'seatsProposed',
+      };
+      const configurationType: ConfigurationType =
+        configurationsManagerService.identifierType(configurationIdentifier);
+      expect(configurationType).toBe(ConfigurationType.INT);
+    });
+    it('should throw if configuration item is not found', () => {
+      const configurationIdentifier: ConfigurationIdentifier = {
+        domain: ConfigurationDomain.CARPOOL,
+        key: 'minAge',
+      };
+      expect(() => {
+        configurationsManagerService.identifierType(configurationIdentifier);
+      }).toThrow(NotFoundException);
+    });
+  });
+
+  describe('configurationType', () => {
+    it('should return the configuration type of an int', () => {
+      expect(configurationsManagerService.configurationType(3)).toBe(
+        ConfigurationType.INT,
+      );
+    });
+    it('should return the configuration type of a float', () => {
+      expect(configurationsManagerService.configurationType(3.5)).toBe(
+        ConfigurationType.FLOAT,
+      );
+    });
+    it('should return the configuration type of a boolean', () => {
+      expect(configurationsManagerService.configurationType(true)).toBe(
+        ConfigurationType.BOOLEAN,
+      );
+    });
+    it('should return the configuration type of a string', () => {
+      expect(configurationsManagerService.configurationType('role')).toBe(
+        ConfigurationType.STRING,
+      );
+    });
+  });
+
+  describe('cast', () => {
+    it('should cast a string to int', () => {
+      expect(
+        configurationsManagerService.cast('1', ConfigurationType.INT),
+      ).toBe(1);
+    });
+    it('should cast a string to float', () => {
+      expect(
+        configurationsManagerService.cast('1.5', ConfigurationType.FLOAT),
+      ).toBe(1.5);
+    });
+    it('should cast a string to boolean', () => {
+      expect(
+        configurationsManagerService.cast('true', ConfigurationType.BOOLEAN),
+      ).toBeTruthy();
+    });
+    it('should not cast a string and return it as is', () => {
+      expect(
+        configurationsManagerService.cast('role', ConfigurationType.STRING),
+      ).toBe('role');
+    });
+  });
+});
diff --git a/src/modules/configuration/tests/unit/core/configurations-manager.spec.ts b/src/modules/configuration/tests/unit/core/configurations-manager.spec.ts
deleted file mode 100644
index c5974dd..0000000
--- a/src/modules/configuration/tests/unit/core/configurations-manager.spec.ts
+++ /dev/null
@@ -1,46 +0,0 @@
-import { ConfigurationsManagerService } from '@modules/configuration/core/application/services/configurations-manager.service';
-import { ConfigService } from '@nestjs/config';
-import { Test, TestingModule } from '@nestjs/testing';
-
-const mockConfigService = {
-  get: jest.fn().mockImplementation((domain: string) => {
-    switch (domain) {
-      case 'carpool':
-        return {
-          departureTimeMargin: 900,
-          role: 'passenger',
-          seatsProposed: 3,
-          seatsRequested: 1,
-          strictFrequency: false,
-        };
-      case 'pagination':
-        return {
-          perPage: 10,
-        };
-    }
-  }),
-};
-
-describe('Configurations Manager Service', () => {
-  let configurationsManagerService: ConfigurationsManagerService;
-
-  beforeAll(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [
-        {
-          provide: ConfigService,
-          useValue: mockConfigService,
-        },
-        ConfigurationsManagerService,
-      ],
-    }).compile();
-
-    configurationsManagerService = module.get<ConfigurationsManagerService>(
-      ConfigurationsManagerService,
-    );
-  });
-
-  it('should be defined', () => {
-    expect(configurationsManagerService).toBeDefined();
-  });
-});
diff --git a/src/modules/configuration/tests/unit/core/populate.service.spec.ts b/src/modules/configuration/tests/unit/core/populate.service.spec.ts
index c31ab4d..63d4cc7 100644
--- a/src/modules/configuration/tests/unit/core/populate.service.spec.ts
+++ b/src/modules/configuration/tests/unit/core/populate.service.spec.ts
@@ -59,11 +59,4 @@ describe('Populate Service', () => {
   it('should be defined', () => {
     expect(populateService).toBeDefined();
   });
-
-  // it('should populate database with default values', () => {
-  //   jest.spyOn(mockConfigurationRepository, 'get');
-  //   jest.spyOn(mockConfigurationRepository, 'set');
-  //   expect(mockConfigurationRepository.get).toHaveBeenCalled();
-  //   expect(mockConfigurationRepository.set).toHaveBeenCalled();
-  // });
 });