diff --git a/plugins/azure-devops/src/api/AzureDevOpsClient.ts b/plugins/azure-devops/src/api/AzureDevOpsClient.ts
index 7e566e458f..ec727f4973 100644
--- a/plugins/azure-devops/src/api/AzureDevOpsClient.ts
+++ b/plugins/azure-devops/src/api/AzureDevOpsClient.ts
@@ -37,7 +37,7 @@ export class AzureDevOpsClient implements AzureDevOpsApi {
     this.identityApi = options.identityApi;
   }
 
-  async getRepoBuilds(
+  public async getRepoBuilds(
     projectName: string,
     repoName: string,
     options?: RepoBuildOptions,
@@ -48,7 +48,7 @@ export class AzureDevOpsClient implements AzureDevOpsApi {
     return { items };
   }
 
-  async getPullRequests(
+  public async getPullRequests(
     projectName: string,
     repoName: string,
     options?: PullRequestOptions,
diff --git a/plugins/azure-devops/src/components/BuildTable/BuildTable.test.ts b/plugins/azure-devops/src/components/BuildTable/BuildTable.test.ts
index 7f7d72b027..3797cb65d6 100644
--- a/plugins/azure-devops/src/components/BuildTable/BuildTable.test.ts
+++ b/plugins/azure-devops/src/components/BuildTable/BuildTable.test.ts
@@ -241,4 +241,24 @@ describe('getBuildStateComponent', () => {
       expect(getByText('Unknown')).toBeInTheDocument();
     });
   });
-});
\ No newline at end of file
+});
+
+describe('getBuildDuration', () => {
+  describe('getBuildDuration with undefined startTime and valid finishTime', () => {
+    it('should return empty result', () => {
+      const finishTime = new Date('2021-10-15T11:00:00.0000000Z');
+
+      const result = getBuildDuration(undefined, finishTime);
+
+      expect(result).toEqual('');
+    });
+  });
+
+  describe('getBuildDuration with undefined startTime and undefined finishTime', () => {
+    it('should return empty result', () => {
+      const result = getBuildDuration(undefined, undefined);
+
+      expect(result).toEqual('');
+    });
+  });
+});
diff --git a/plugins/azure-devops/src/components/BuildTable/BuildTable.tsx b/plugins/azure-devops/src/components/BuildTable/BuildTable.tsx
index 27602f9345..6166c81aa6 100644
--- a/plugins/azure-devops/src/components/BuildTable/BuildTable.tsx
+++ b/plugins/azure-devops/src/components/BuildTable/BuildTable.tsx
@@ -115,7 +115,10 @@ export const getBuildStateComponent = (
   }
 };
 
-export const getBuildDuration = (startTime?: Date, finishTime?: Date) => {
+export const getBuildDuration = (
+  startTime?: Date,
+  finishTime?: Date,
+): string => {
   if (!startTime || (!startTime && !finishTime)) {
     return '';
   }