diff --git a/__tests__/config.test.ts b/__tests__/config.test.ts
index e60a74c..12a4b27 100644
--- a/__tests__/config.test.ts
+++ b/__tests__/config.test.ts
@@ -48,7 +48,7 @@ describe('config.resolvePublishActionOptions', () => {
 
   it('throws an error when the ref is not provided', async () => {
     getInputMock.mockReturnValueOnce('token')
-    process.env.GITHUB_REF = ''
+    github.context.ref = ''
 
     await expect(cfg.resolvePublishActionOptions()).rejects.toThrow(
       'Could not find GITHUB_REF.'
@@ -66,7 +66,7 @@ describe('config.resolvePublishActionOptions', () => {
 
   it('throws an error when the repository is not provided', async () => {
     getInputMock.mockReturnValueOnce('token')
-    process.env.GITHUB_REPOSITORY = ''
+    github.context.payload.repository = undefined
 
     await expect(cfg.resolvePublishActionOptions()).rejects.toThrow(
       'Could not find Repository.'
@@ -75,7 +75,7 @@ describe('config.resolvePublishActionOptions', () => {
 
   it('throws an error when the apiBaseUrl is not provided', async () => {
     getInputMock.mockReturnValueOnce('token')
-    process.env.GITHUB_API_URL = ''
+    github.context.apiUrl = ''
 
     await expect(cfg.resolvePublishActionOptions()).rejects.toThrow(
       'Could not find GITHUB_API_URL.'
@@ -93,7 +93,7 @@ describe('config.resolvePublishActionOptions', () => {
 
   it('throws an error when the sha is not provided', async () => {
     getInputMock.mockReturnValueOnce('token')
-    process.env.GITHUB_SHA = ''
+    github.context.sha = ''
 
     await expect(cfg.resolvePublishActionOptions()).rejects.toThrow(
       'Could not find GITHUB_SHA.'
@@ -102,7 +102,7 @@ describe('config.resolvePublishActionOptions', () => {
 
   it('throws an error when the githubServerUrl is not provided', async () => {
     getInputMock.mockReturnValueOnce('token')
-    process.env.GITHUB_SERVER_URL = ''
+    github.context.serverUrl = ''
 
     await expect(cfg.resolvePublishActionOptions()).rejects.toThrow(
       'Could not find GITHUB_SERVER_URL.'
@@ -235,7 +235,7 @@ describe('config.resolvePublishActionOptions', () => {
       ownerId: 'repositoryOwnerId'
     })
 
-    process.env.GITHUB_SERVER_URL = 'https://github-enterprise.com'
+    github.context.serverUrl = 'https://github-enterprise.com'
 
     const options = await cfg.resolvePublishActionOptions()
 
@@ -296,27 +296,36 @@ describe('config.serializeOptions', () => {
 })
 
 function configureEventContext(): void {
-  process.env.GITHUB_REF = 'ref'
-  process.env.GITHUB_WORKSPACE = 'workspaceDir'
-  process.env.GITHUB_REPOSITORY = 'nameWithOwner'
-  process.env.GITHUB_API_URL = 'apiBaseUrl'
+  github.context.ref = 'ref'
+  github.context.eventName = 'release'
+  github.context.apiUrl = 'apiBaseUrl'
+  github.context.sha = 'sha'
+  github.context.serverUrl = 'https://github.com/'
+  github.context.payload = {
+    repository: {
+      full_name: 'nameWithOwner',
+      name: 'name',
+      owner: {
+        login: 'owner'
+      }
+    }
+  }
+
   process.env.RUNNER_TEMP = 'runnerTempDir'
-  process.env.GITHUB_SHA = 'sha'
-  process.env.GITHUB_SERVER_URL = 'https://github.com/'
+  process.env.GITHUB_WORKSPACE = 'workspaceDir'
   process.env.GITHUB_REPOSITORY_ID = 'repositoryId'
   process.env.GITHUB_REPOSITORY_OWNER_ID = 'repositoryOwnerId'
-  github.context.eventName = 'release'
 }
 
 function clearEventContext(): void {
-  process.env.GITHUB_REF = ''
-  process.env.GITHUB_WORKSPACE = ''
-  process.env.GITHUB_REPOSITORY = ''
-  process.env.GITHUB_API_URL = ''
+  github.context.ref = ''
+  github.context.eventName = ''
+  github.context.apiUrl = ''
+  github.context.sha = ''
+  github.context.serverUrl = ''
+  github.context.payload = {}
   process.env.RUNNER_TEMP = ''
-  process.env.GITHUB_SHA = ''
-  process.env.GITHUB_SERVER_URL = ''
+  process.env.GITHUB_WORKSPACE = ''
   process.env.GITHUB_REPOSITORY_ID = ''
   process.env.GITHUB_REPOSITORY_OWNER_ID = ''
-  github.context.eventName = ''
 }
diff --git a/__tests__/fs-helper.test.ts b/__tests__/fs-helper.test.ts
index fa88c90..4456db8 100644
--- a/__tests__/fs-helper.test.ts
+++ b/__tests__/fs-helper.test.ts
@@ -256,18 +256,32 @@ describe('ensureCorrectShaCheckedOut', () => {
   it('throws an error if the correct SHA is not checked out', async () => {
     await expect(
       fsHelper.ensureTagAndRefCheckedOut(`refs/tags/${tag1}`, commit1, dir)
-    ).rejects.toThrow()
+    ).rejects.toThrow(
+      'The expected commit associated with the tag refs/tags/tag1 is not checked out.'
+    )
+  })
+
+  it('throws if there is an issue getting sha for tag', async () => {
+    await expect(async () =>
+      fsHelper.ensureTagAndRefCheckedOut(
+        `refs/tags/some-unknown-tag`,
+        commit2,
+        dir
+      )
+    ).rejects.toThrow('Error retrieving commit associated with tag')
   })
 
   it('throws an error if the sha of the tag does not match expected sha', async () => {
     await expect(async () =>
       fsHelper.ensureTagAndRefCheckedOut(`refs/tags/${tag1}`, commit2, dir)
-    ).rejects.toThrow()
+    ).rejects.toThrow(
+      'The commit associated with the tag refs/tags/tag1 does not match the SHA of the commit provided by the actions context.'
+    )
   })
 
   it('throws if the provided ref is not a tag ref', async () => {
     await expect(async () =>
       fsHelper.ensureTagAndRefCheckedOut(`refs/heads/main`, commit2, dir)
-    ).rejects.toThrow()
+    ).rejects.toThrow('Tag ref provided is not in expected format.')
   })
 })
diff --git a/badges/coverage.svg b/badges/coverage.svg
index d252813..9c6aee7 100644
--- a/badges/coverage.svg
+++ b/badges/coverage.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="116" height="20" role="img" aria-label="Coverage: 97.56%"><title>Coverage: 97.56%</title><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="116" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="63" height="20" fill="#555"/><rect x="63" width="53" height="20" fill="#4c1"/><rect width="116" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="325" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="530">Coverage</text><text x="325" y="140" transform="scale(.1)" fill="#fff" textLength="530">Coverage</text><text aria-hidden="true" x="885" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="430">97.56%</text><text x="885" y="140" transform="scale(.1)" fill="#fff" textLength="430">97.56%</text></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="116" height="20" role="img" aria-label="Coverage: 97.31%"><title>Coverage: 97.31%</title><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="116" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="63" height="20" fill="#555"/><rect x="63" width="53" height="20" fill="#4c1"/><rect width="116" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="325" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="530">Coverage</text><text x="325" y="140" transform="scale(.1)" fill="#fff" textLength="530">Coverage</text><text aria-hidden="true" x="885" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="430">97.31%</text><text x="885" y="140" transform="scale(.1)" fill="#fff" textLength="430">97.31%</text></g></svg>
\ No newline at end of file
diff --git a/dist/index.js b/dist/index.js
index c3228d8..30bfc2a 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -106410,35 +106410,35 @@ async function resolvePublishActionOptions() {
     if (event === '') {
         throw new Error(`Could not find event name.`);
     }
-    // Environment Variables
-    const ref = process.env.GITHUB_REF || '';
+    const ref = github.context.ref || '';
     if (ref === '') {
         throw new Error(`Could not find GITHUB_REF.`);
     }
+    const nameWithOwner = github.context.payload.repository?.full_name || '';
+    if (nameWithOwner === '') {
+        throw new Error(`Could not find Repository.`);
+    }
+    const sha = github.context.sha || '';
+    if (sha === '') {
+        throw new Error(`Could not find GITHUB_SHA.`);
+    }
+    const apiBaseUrl = github.context.apiUrl || '';
+    if (apiBaseUrl === '') {
+        throw new Error(`Could not find GITHUB_API_URL.`);
+    }
+    const githubServerUrl = github.context.serverUrl || '';
+    if (githubServerUrl === '') {
+        throw new Error(`Could not find GITHUB_SERVER_URL.`);
+    }
+    // Environment Variables
     const workspaceDir = process.env.GITHUB_WORKSPACE || '';
     if (workspaceDir === '') {
         throw new Error(`Could not find GITHUB_WORKSPACE.`);
     }
-    const nameWithOwner = process.env.GITHUB_REPOSITORY || '';
-    if (nameWithOwner === '') {
-        throw new Error(`Could not find Repository.`);
-    }
-    const apiBaseUrl = process.env.GITHUB_API_URL || '';
-    if (apiBaseUrl === '') {
-        throw new Error(`Could not find GITHUB_API_URL.`);
-    }
     const runnerTempDir = process.env.RUNNER_TEMP || '';
     if (runnerTempDir === '') {
         throw new Error(`Could not find RUNNER_TEMP.`);
     }
-    const sha = process.env.GITHUB_SHA || '';
-    if (sha === '') {
-        throw new Error(`Could not find GITHUB_SHA.`);
-    }
-    const githubServerUrl = process.env.GITHUB_SERVER_URL || '';
-    if (githubServerUrl === '') {
-        throw new Error(`Could not find GITHUB_SERVER_URL.`);
-    }
     const repositoryId = process.env.GITHUB_REPOSITORY_ID || '';
     if (repositoryId === '') {
         throw new Error(`Could not find GITHUB_REPOSITORY_ID.`);
@@ -106622,11 +106622,23 @@ async function ensureTagAndRefCheckedOut(tagRef, expectedSha, gitDir) {
         throw new Error(`Tag ref provided is not in expected format.`);
     }
     const git = simpleGit.simpleGit(gitDir);
-    const tagCommitSha = await git.raw(['rev-parse', '--verify', tagRef]);
+    let tagCommitSha;
+    try {
+        tagCommitSha = await git.raw(['rev-parse', '--verify', tagRef]);
+    }
+    catch (err) {
+        throw new Error(`Error retrieving commit associated with tag: ${err}`);
+    }
     if (tagCommitSha.trim() !== expectedSha) {
         throw new Error(`The commit associated with the tag ${tagRef} does not match the SHA of the commit provided by the actions context.`);
     }
-    const currentlyCheckedOutSha = await git.revparse(['HEAD']);
+    let currentlyCheckedOutSha;
+    try {
+        currentlyCheckedOutSha = await git.revparse(['HEAD']);
+    }
+    catch (err) {
+        throw new Error(`Error validating checked out tag and ref: ${err}`);
+    }
     if (currentlyCheckedOutSha.trim() !== expectedSha) {
         throw new Error(`The expected commit associated with the tag ${tagRef} is not checked out.`);
     }
diff --git a/src/config.ts b/src/config.ts
index 20ab07a..9e35d8f 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -45,42 +45,43 @@ export async function resolvePublishActionOptions(): Promise<PublishActionOption
     throw new Error(`Could not find event name.`)
   }
 
-  // Environment Variables
-  const ref: string = process.env.GITHUB_REF || ''
+  const ref: string = github.context.ref || ''
   if (ref === '') {
     throw new Error(`Could not find GITHUB_REF.`)
   }
 
+  const nameWithOwner: string =
+    github.context.payload.repository?.full_name || ''
+  if (nameWithOwner === '') {
+    throw new Error(`Could not find Repository.`)
+  }
+
+  const sha: string = github.context.sha || ''
+  if (sha === '') {
+    throw new Error(`Could not find GITHUB_SHA.`)
+  }
+
+  const apiBaseUrl: string = github.context.apiUrl || ''
+  if (apiBaseUrl === '') {
+    throw new Error(`Could not find GITHUB_API_URL.`)
+  }
+
+  const githubServerUrl = github.context.serverUrl || ''
+  if (githubServerUrl === '') {
+    throw new Error(`Could not find GITHUB_SERVER_URL.`)
+  }
+
+  // Environment Variables
   const workspaceDir: string = process.env.GITHUB_WORKSPACE || ''
   if (workspaceDir === '') {
     throw new Error(`Could not find GITHUB_WORKSPACE.`)
   }
 
-  const nameWithOwner: string = process.env.GITHUB_REPOSITORY || ''
-  if (nameWithOwner === '') {
-    throw new Error(`Could not find Repository.`)
-  }
-
-  const apiBaseUrl: string = process.env.GITHUB_API_URL || ''
-  if (apiBaseUrl === '') {
-    throw new Error(`Could not find GITHUB_API_URL.`)
-  }
-
   const runnerTempDir: string = process.env.RUNNER_TEMP || ''
   if (runnerTempDir === '') {
     throw new Error(`Could not find RUNNER_TEMP.`)
   }
 
-  const sha: string = process.env.GITHUB_SHA || ''
-  if (sha === '') {
-    throw new Error(`Could not find GITHUB_SHA.`)
-  }
-
-  const githubServerUrl = process.env.GITHUB_SERVER_URL || ''
-  if (githubServerUrl === '') {
-    throw new Error(`Could not find GITHUB_SERVER_URL.`)
-  }
-
   const repositoryId = process.env.GITHUB_REPOSITORY_ID || ''
   if (repositoryId === '') {
     throw new Error(`Could not find GITHUB_REPOSITORY_ID.`)
diff --git a/src/fs-helper.ts b/src/fs-helper.ts
index ac65815..2d4965b 100644
--- a/src/fs-helper.ts
+++ b/src/fs-helper.ts
@@ -129,14 +129,25 @@ export async function ensureTagAndRefCheckedOut(
 
   const git: simpleGit.SimpleGit = simpleGit.simpleGit(gitDir)
 
-  const tagCommitSha = await git.raw(['rev-parse', '--verify', tagRef])
+  let tagCommitSha: string
+
+  try {
+    tagCommitSha = await git.raw(['rev-parse', '--verify', tagRef])
+  } catch (err) {
+    throw new Error(`Error retrieving commit associated with tag: ${err}`)
+  }
   if (tagCommitSha.trim() !== expectedSha) {
     throw new Error(
       `The commit associated with the tag ${tagRef} does not match the SHA of the commit provided by the actions context.`
     )
   }
 
-  const currentlyCheckedOutSha = await git.revparse(['HEAD'])
+  let currentlyCheckedOutSha: string
+  try {
+    currentlyCheckedOutSha = await git.revparse(['HEAD'])
+  } catch (err) {
+    throw new Error(`Error validating checked out tag and ref: ${err}`)
+  }
   if (currentlyCheckedOutSha.trim() !== expectedSha) {
     throw new Error(
       `The expected commit associated with the tag ${tagRef} is not checked out.`