diff --git a/src/shared/dto/baseline-data.dto.ts b/src/shared/dto/baseline-data.dto.ts
new file mode 100644
index 00000000..7c030986
--- /dev/null
+++ b/src/shared/dto/baseline-data.dto.ts
@@ -0,0 +1,38 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsOptional } from 'class-validator';
+
+export class BaselineDataDto {
+  @ApiProperty()
+  @IsString()
+  name: string;
+
+  @ApiProperty()
+  @IsOptional()
+  @IsString()
+  os?: string;
+
+  @ApiProperty()
+  @IsOptional()
+  @IsString()
+  browser?: string;
+
+  @ApiProperty()
+  @IsOptional()
+  @IsString()
+  viewport?: string;
+
+  @ApiProperty()
+  @IsOptional()
+  @IsString()
+  device?: string;
+}
+
+export const convertBaselineDataToQuery = (data: BaselineDataDto) => {
+  return {
+    name: data.name,
+    os: data.os ? data.os : null,
+    browser: data.browser ? data.browser : null,
+    device: data.device ? data.device : null,
+    viewport: data.viewport ? data.viewport : null,
+  };
+};
diff --git a/src/test-runs/dto/create-test-request.dto.ts b/src/test-runs/dto/create-test-request.dto.ts
index b7ab1c18..44c0c0d2 100644
--- a/src/test-runs/dto/create-test-request.dto.ts
+++ b/src/test-runs/dto/create-test-request.dto.ts
@@ -1,35 +1,12 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsString, IsOptional, IsBase64, IsUUID, IsNumber } from 'class-validator';
-
-export class CreateTestRequestDto {
-  @ApiProperty()
-  @IsString()
-  name: string;
+import { IsOptional, IsBase64, IsUUID, IsNumber } from 'class-validator';
+import { BaselineDataDto } from '../../shared/dto/baseline-data.dto';
 
+export class CreateTestRequestDto extends BaselineDataDto {
   @ApiProperty()
   @IsBase64()
   imageBase64: string;
 
-  @ApiProperty()
-  @IsOptional()
-  @IsString()
-  os?: string;
-
-  @ApiProperty()
-  @IsOptional()
-  @IsString()
-  browser?: string;
-
-  @ApiProperty()
-  @IsOptional()
-  @IsString()
-  viewport?: string;
-
-  @ApiProperty()
-  @IsOptional()
-  @IsString()
-  device?: string;
-
   @ApiProperty()
   @IsUUID()
   buildId: string;
diff --git a/src/test-runs/test-runs.service.ts b/src/test-runs/test-runs.service.ts
index d7991fca..3eccd8d5 100644
--- a/src/test-runs/test-runs.service.ts
+++ b/src/test-runs/test-runs.service.ts
@@ -12,6 +12,7 @@ import { CommentDto } from '../shared/dto/comment.dto';
 import { BuildDto } from '../builds/dto/build.dto';
 import { TestRunResultDto } from '../test-runs/dto/testRunResult.dto';
 import { TestVariationsService } from '../test-variations/test-variations.service';
+import { convertBaselineDataToQuery } from '../shared/dto/baseline-data.dto';
 
 @Injectable()
 export class TestRunsService {
@@ -19,8 +20,8 @@ export class TestRunsService {
     private testVariationService: TestVariationsService,
     private prismaService: PrismaService,
     private staticService: StaticService,
-    private eventsGateway: EventsGateway,
-  ) { }
+    private eventsGateway: EventsGateway
+  ) {}
 
   async findMany(buildId: string): Promise<TestRun[]> {
     return this.prismaService.testRun.findMany({
@@ -44,8 +45,24 @@ export class TestRunsService {
   }
 
   async postTestRun(createTestRequestDto: CreateTestRequestDto): Promise<TestRunResultDto> {
-    const testVariation = await this.testVariationService.findOrCreate(createTestRequestDto);
+    const baselineData = convertBaselineDataToQuery(createTestRequestDto);
 
+    // creates variatioin if does not exist
+    const testVariation = await this.testVariationService.findOrCreate(createTestRequestDto.projectId, baselineData);
+
+    // delete previous test run if exists
+    let [previousTestRun] = await this.prismaService.testRun.findMany({
+      where: {
+        buildId: createTestRequestDto.buildId,
+        ...baselineData,
+      },
+    });
+
+    if (!!previousTestRun) {
+      await this.delete(previousTestRun.id);
+    }
+
+    // create test run result
     const testRun = await this.create(testVariation, createTestRequestDto);
 
     return new TestRunResultDto(testRun, testVariation);
@@ -54,14 +71,14 @@ export class TestRunsService {
   async emitUpdateBuildEvent(buildId: string) {
     const build = await this.prismaService.build.findOne({
       where: {
-        id: buildId
+        id: buildId,
       },
       include: {
-        testRuns: true
-      }
-    })
-    const buildDto = new BuildDto(build)
-    this.eventsGateway.buildUpdated(buildDto)
+        testRuns: true,
+      },
+    });
+    const buildDto = new BuildDto(build);
+    this.eventsGateway.buildUpdated(buildDto);
   }
 
   async approve(id: string): Promise<TestRun> {
@@ -93,7 +110,7 @@ export class TestRunsService {
       },
     });
 
-    this.emitUpdateBuildEvent(testRun.buildId)
+    this.emitUpdateBuildEvent(testRun.buildId);
     return testRunUpdated;
   }
 
@@ -105,7 +122,7 @@ export class TestRunsService {
       },
     });
 
-    this.emitUpdateBuildEvent(testRun.buildId)
+    this.emitUpdateBuildEvent(testRun.buildId);
     return testRun;
   }
 
diff --git a/src/test-variations/test-variations.service.spec.ts b/src/test-variations/test-variations.service.spec.ts
index e16fd16b..05e7c67c 100644
--- a/src/test-variations/test-variations.service.spec.ts
+++ b/src/test-variations/test-variations.service.spec.ts
@@ -6,6 +6,7 @@ import { StaticService } from '../shared/static/static.service';
 import { IgnoreAreaDto } from '../test-runs/dto/ignore-area.dto';
 import { TestVariation, Baseline } from '@prisma/client';
 import { CommentDto } from '../shared/dto/comment.dto';
+import { convertBaselineDataToQuery } from '../shared/dto/baseline-data.dto';
 
 const initModule = async ({
   imageDeleteMock = jest.fn(),
@@ -97,7 +98,7 @@ describe('TestVariationsService', () => {
       const variationFindManyMock = jest.fn();
       service = await initModule({ variationFindManyMock: variationFindManyMock.mockResolvedValueOnce([data]) });
 
-      const result = await service.findOrCreate(data);
+      const result = await service.findOrCreate(data.projectId, convertBaselineDataToQuery(data));
 
       expect(variationFindManyMock).toHaveBeenCalledWith({
         where: {
@@ -117,7 +118,7 @@ describe('TestVariationsService', () => {
       const variationFindManyMock = jest.fn();
       service = await initModule({ variationFindManyMock: variationFindManyMock.mockResolvedValueOnce([data]) });
 
-      const result = await service.findOrCreate(data);
+      const result = await service.findOrCreate(data.projectId, convertBaselineDataToQuery(data));
 
       expect(variationFindManyMock).toHaveBeenCalledWith({
         where: {
@@ -137,7 +138,7 @@ describe('TestVariationsService', () => {
       const variationCreateMock = jest.fn();
       service = await initModule({ variationCreateMock: variationCreateMock.mockResolvedValueOnce(data) });
 
-      const result = await service.findOrCreate(data);
+      const result = await service.findOrCreate(data.projectId, convertBaselineDataToQuery(data));
 
       expect(variationCreateMock).toHaveBeenCalledWith({
         data: {
diff --git a/src/test-variations/test-variations.service.ts b/src/test-variations/test-variations.service.ts
index 3900c78f..a03e8291 100644
--- a/src/test-variations/test-variations.service.ts
+++ b/src/test-variations/test-variations.service.ts
@@ -1,10 +1,10 @@
 import { Injectable } from '@nestjs/common';
-import { CreateTestRequestDto } from '../test-runs/dto/create-test-request.dto';
 import { IgnoreAreaDto } from '../test-runs/dto/ignore-area.dto';
 import { PrismaService } from '../prisma/prisma.service';
 import { TestVariation, Baseline } from '@prisma/client';
 import { StaticService } from '../shared/static/static.service';
 import { CommentDto } from '../shared/dto/comment.dto';
+import { BaselineDataDto } from '../shared/dto/baseline-data.dto';
 
 @Injectable()
 export class TestVariationsService {
@@ -26,26 +26,19 @@ export class TestVariationsService {
     });
   }
 
-  async findOrCreate(createTestDto: CreateTestRequestDto): Promise<TestVariation> {
-    const data = {
-      name: createTestDto.name,
-      os: createTestDto.os ? createTestDto.os : null,
-      browser: createTestDto.browser ? createTestDto.browser : null,
-      viewport: createTestDto.viewport ? createTestDto.viewport : null,
-      device: createTestDto.device ? createTestDto.device : null,
-    };
+  async findOrCreate(projectId: string, baselineData: BaselineDataDto): Promise<TestVariation> {
     let [testVariation] = await this.prismaService.testVariation.findMany({
       where: {
-        projectId: createTestDto.projectId,
-        ...data,
+        projectId,
+        ...baselineData,
       },
     });
 
     if (!testVariation) {
       testVariation = await this.prismaService.testVariation.create({
         data: {
-          project: { connect: { id: createTestDto.projectId } },
-          ...data,
+          project: { connect: { id: projectId } },
+          ...baselineData,
         },
       });
     }