diff --git a/.github/workflows/pr_build.yml b/.github/workflows/pr_build.yml
index 483e663a2..410f1e1fe 100644
--- a/.github/workflows/pr_build.yml
+++ b/.github/workflows/pr_build.yml
@@ -81,7 +81,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         java_version: [17]
-        test-target: [rust, java]
+        test-target: [java]
         spark-version: ['4.0']
         is_push_event:
           - ${{ github.event_name == 'push' }}
@@ -97,22 +97,16 @@ jobs:
         with:
           rust-version: ${{env.RUST_VERSION}}
           jdk-version: ${{ matrix.java_version }}
-      - if: matrix.test-target == 'rust'
-        name: Rust test steps
-        uses: ./.github/actions/rust-test
-      - if: matrix.test-target == 'java'
-        name: Clone Spark
+      - name: Clone Spark
         uses: actions/checkout@v4
         with:
           repository: "apache/spark"
           path: "apache-spark"
-      - if: matrix.test-target == 'java'
-        name: Install Spark
+      - name: Install Spark
         shell: bash
         working-directory: ./apache-spark
         run: build/mvn install -Phive -Phadoop-cloud -DskipTests
-      - if: matrix.test-target == 'java'
-        name: Java test steps
+      - name: Java test steps
         uses: ./.github/actions/java-test
         with:
           # TODO: remove -DskipTests after fixing tests
@@ -218,7 +212,7 @@ jobs:
       matrix:
         os: [macos-13]
         java_version: [17]
-        test-target: [rust, java]
+        test-target: [java]
         spark-version: ['4.0']
       fail-fast: false
     if: github.event_name == 'push'
@@ -231,22 +225,16 @@ jobs:
         with:
           rust-version: ${{env.RUST_VERSION}}
           jdk-version: ${{ matrix.java_version }}
-      - if: matrix.test-target == 'rust'
-        name: Rust test steps
-        uses: ./.github/actions/rust-test
-      - if: matrix.test-target == 'java'
-        name: Clone Spark
+      - name: Clone Spark
         uses: actions/checkout@v4
         with:
           repository: "apache/spark"
           path: "apache-spark"
-      - if: matrix.test-target == 'java'
-        name: Install Spark
+      - name: Install Spark
         shell: bash
         working-directory: ./apache-spark
         run: build/mvn install -Phive -Phadoop-cloud -DskipTests
-      - if: matrix.test-target == 'java'
-        name: Java test steps
+      - name: Java test steps
         uses: ./.github/actions/java-test
         with:
           # TODO: remove -DskipTests after fixing tests
@@ -258,7 +246,7 @@ jobs:
     strategy:
       matrix:
         java_version: [17]
-        test-target: [rust, java]
+        test-target: [java]
         spark-version: ['4.0']
         is_push_event:
           - ${{ github.event_name == 'push' }}
@@ -277,22 +265,16 @@ jobs:
           jdk-version: ${{ matrix.java_version }}
           jdk-architecture: aarch64
           protoc-architecture: aarch_64
-      - if: matrix.test-target == 'rust'
-        name: Rust test steps
-        uses: ./.github/actions/rust-test
-      - if: matrix.test-target == 'java'
-        name: Clone Spark
+      - name: Clone Spark
         uses: actions/checkout@v4
         with:
           repository: "apache/spark"
           path: "apache-spark"
-      - if: matrix.test-target == 'java'
-        name: Install Spark
+      - name: Install Spark
         shell: bash
         working-directory: ./apache-spark
         run: build/mvn install -Phive -Phadoop-cloud -DskipTests
-      - if: matrix.test-target == 'java'
-        name: Java test steps
+      - name: Java test steps
         uses: ./.github/actions/java-test
         with:
           # TODO: remove -DskipTests after fixing tests
diff --git a/spark/src/main/spark-3.2/org/apache/comet/shims/CometExprShim.scala b/spark/src/main/spark-3.2/org/apache/comet/shims/CometExprShim.scala
index 0c45a9c2c..f5a578f82 100644
--- a/spark/src/main/spark-3.2/org/apache/comet/shims/CometExprShim.scala
+++ b/spark/src/main/spark-3.2/org/apache/comet/shims/CometExprShim.scala
@@ -25,8 +25,8 @@ import org.apache.spark.sql.catalyst.expressions._
  */
 trait CometExprShim {
     /**
-      * Returns a tuple of expressions for the `unhex` function.
-      */
+     * Returns a tuple of expressions for the `unhex` function.
+     */
     def unhexSerde(unhex: Unhex): (Expression, Expression) = {
         (unhex.child, Literal(false))
     }
diff --git a/spark/src/main/spark-3.3/org/apache/comet/shims/CometExprShim.scala b/spark/src/main/spark-3.3/org/apache/comet/shims/CometExprShim.scala
index 0c45a9c2c..f5a578f82 100644
--- a/spark/src/main/spark-3.3/org/apache/comet/shims/CometExprShim.scala
+++ b/spark/src/main/spark-3.3/org/apache/comet/shims/CometExprShim.scala
@@ -25,8 +25,8 @@ import org.apache.spark.sql.catalyst.expressions._
  */
 trait CometExprShim {
     /**
-      * Returns a tuple of expressions for the `unhex` function.
-      */
+     * Returns a tuple of expressions for the `unhex` function.
+     */
     def unhexSerde(unhex: Unhex): (Expression, Expression) = {
         (unhex.child, Literal(false))
     }
diff --git a/spark/src/main/spark-3.4/org/apache/comet/shims/CometExprShim.scala b/spark/src/main/spark-3.4/org/apache/comet/shims/CometExprShim.scala
index 409e1c94b..3f2301f0a 100644
--- a/spark/src/main/spark-3.4/org/apache/comet/shims/CometExprShim.scala
+++ b/spark/src/main/spark-3.4/org/apache/comet/shims/CometExprShim.scala
@@ -25,8 +25,8 @@ import org.apache.spark.sql.catalyst.expressions._
  */
 trait CometExprShim {
     /**
-      * Returns a tuple of expressions for the `unhex` function.
-      */
+     * Returns a tuple of expressions for the `unhex` function.
+     */
     def unhexSerde(unhex: Unhex): (Expression, Expression) = {
         (unhex.child, Literal(unhex.failOnError))
     }
diff --git a/spark/src/main/spark-4.0/org/apache/comet/shims/CometExprShim.scala b/spark/src/main/spark-4.0/org/apache/comet/shims/CometExprShim.scala
index 7d4ec1537..01f923206 100644
--- a/spark/src/main/spark-4.0/org/apache/comet/shims/CometExprShim.scala
+++ b/spark/src/main/spark-4.0/org/apache/comet/shims/CometExprShim.scala
@@ -25,8 +25,8 @@ import org.apache.spark.sql.catalyst.expressions._
  */
 trait CometExprShim {
     /**
-      * Returns a tuple of expressions for the `unhex` function.
-      */
+     * Returns a tuple of expressions for the `unhex` function.
+     */
     protected def unhexSerde(unhex: Unhex): (Expression, Expression) = {
         (unhex.child, Literal(unhex.failOnError))
     }
diff --git a/spark/src/test/spark-3.4-plus/org/apache/comet/exec/CometExec3_4PlusSuite.scala b/spark/src/test/spark-3.4-plus/org/apache/comet/exec/CometExec3_4PlusSuite.scala
index 8d1a68176..1ceec4b92 100644
--- a/spark/src/test/spark-3.4-plus/org/apache/comet/exec/CometExec3_4PlusSuite.scala
+++ b/spark/src/test/spark-3.4-plus/org/apache/comet/exec/CometExec3_4PlusSuite.scala
@@ -27,7 +27,7 @@ import org.apache.spark.sql.CometTestBase
 import org.apache.comet.CometConf
 
 /**
- * This test suite contains tests for only Spark 3.4.
+ * This test suite contains tests for only Spark 3.4+.
  */
 class CometExec3_4PlusSuite extends CometTestBase {
   import testImplicits._