diff --git a/.gitignore b/.gitignore
index 7ee831e..e9ba520 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ target/
 *.iws
 .idea/
 .bloop/
+.bsp/
 .metals/
 metals.sbt
 
diff --git a/README.md b/README.md
index 1ea4149..f561aca 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,20 @@ addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.3.1")
 1) Add the following to your `.github/workflows/ci.yml`
 
     ```yaml
+    - name: Git checkout (merge)
+      uses: actions/checkout@v3
+      if: github.event_name != 'pull_request'
+      with:
+        fetch-depth: 0
+
+    - name: Git checkout (PR)
+      uses: actions/checkout@v3
+      if: github.event_name == 'pull_request'
+      with:
+        fetch-depth: 0
+        # see: https://frontside.com/blog/2020-05-26-github-actions-pull_request/#how-does-pull_request-affect-actionscheckout
+        ref: ${{ github.event.pull_request.head.sha }}
+
     - name: Run tests
       run: sbt clean coverage test
 
@@ -67,6 +81,11 @@ addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.3.1")
         COVERALLS_FLAG_NAME: Scala ${{ matrix.scala }}
     ```
 
+    Note the separate checkout step for pull requests.
+    It is needed because of
+    [the way pull_request affects actions checkout](https://frontside.com/blog/2020-05-26-github-actions-pull_request/#how-does-pull_request-affect-actionscheckout),
+    so correct commit info could be sent to coveralls.io
+
     If you have a multi-module project, perform `coverageAggregate`
     [as a separate command](https://github.com/scoverage/sbt-scoverage#multi-project-reports)
 
diff --git a/src/main/scala/org/scoverage/coveralls/CIService.scala b/src/main/scala/org/scoverage/coveralls/CIService.scala
index e1e7351..f40f3e3 100644
--- a/src/main/scala/org/scoverage/coveralls/CIService.scala
+++ b/src/main/scala/org/scoverage/coveralls/CIService.scala
@@ -25,18 +25,22 @@ case object TravisPro extends CIService {
 }
 
 case object GitHubActions extends CIService {
-  val name = "github"
+  val name = ""
   val jobId: Option[String] = sys.env.get("GITHUB_RUN_ID")
 
   // https://github.com/coverallsapp/github-action/blob/master/src/run.ts#L31-L40
   val pullRequest: Option[String] = for {
-    eventName <- sys.env.get("GITHUB_EVENT_NAME") if eventName == "pull_request"
+    eventName <- sys.env.get("GITHUB_EVENT_NAME") if eventName.startsWith("pull_request")
     payloadPath <- sys.env.get("GITHUB_EVENT_PATH")
     source = Source.fromFile(payloadPath, "utf-8")
     lines = try source.mkString finally source.close()
     payload <- JSON.parseRaw(lines)
     prNumber <- payload.asInstanceOf[JSONObject].obj.get("number")
-  } yield prNumber.toString
+  } yield prNumber.toString.stripSuffix(".0")
 
-  val currentBranch: Option[String] = sys.env.get("GITHUB_REF")
+  // https://docs.github.com/en/actions/learn-github-actions/environment-variables
+  val currentBranch: Option[String] = pullRequest match {
+    case Some(_) => sys.env.get("GITHUB_HEAD_REF")
+    case None => sys.env.get("GITHUB_REF_NAME")
+  }
 }