diff --git a/.circleci/config.yml b/.circleci/config.yml
index 65222f082..7e568f9d1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -80,18 +80,30 @@ commands:
         type: string
     steps:
       - run: mkdir test-cases/
-      - run: cd test-cases && python3 ../scripts/isolate_tests.py ../test/
-      - run: cd test-cases && python3 ../scripts/bytecodecompare/prepare_report.py << parameters.binary_path >> --interface standard-json --report-file "../bytecode-report-<< parameters.label >>-json.txt"
-      - run: cd test-cases && python3 ../scripts/bytecodecompare/prepare_report.py << parameters.binary_path >> --interface cli --report-file "../bytecode-report-<< parameters.label >>-cli.txt"
+      - run:
+          name: Prepare input files
+          command: |
+            cd test-cases/
+            python3 ../scripts/isolate_tests.py ../test/
+      - run:
+          name: Generate bytecode report
+          command: |
+            cd test-cases/
+            interface=$(echo -e "standard-json\ncli" | circleci tests split)
+            echo "Selected interface: ${interface}"
+
+            python3 ../scripts/bytecodecompare/prepare_report.py \
+              << parameters.binary_path >> \
+              --interface "$interface" \
+              --report-file "../bytecode-report-<< parameters.label >>-${interface}.txt"
       - store_artifacts:
-          path: bytecode-report-<< parameters.label >>-json.txt
+          path: bytecode-report-<< parameters.label >>-standard-json.txt
       - store_artifacts:
           path: bytecode-report-<< parameters.label >>-cli.txt
       - persist_to_workspace:
           root: .
           paths:
-            - bytecode-report-<< parameters.label >>-json.txt
-            - bytecode-report-<< parameters.label >>-cli.txt
+            - bytecode-report-<< parameters.label >>-*.txt
       - matrix_notify_failure_unless_pr
 
   install_python3:
@@ -1477,6 +1489,7 @@ jobs:
       TERM: xterm
       MAKEFLAGS: -j 2
       LC_ALL: C
+    parallelism: 2 # For prepare_bytecode_report
     steps:
       - checkout
       - attach_workspace:
@@ -1491,6 +1504,7 @@ jobs:
       TERM: xterm
       MAKEFLAGS: -j 2
       LC_ALL: C
+    parallelism: 2 # For prepare_bytecode_report
     steps:
       - checkout
       - attach_workspace:
@@ -1505,6 +1519,7 @@ jobs:
       TERM: xterm
       MAKEFLAGS: -j 5
       LC_ALL: C
+    parallelism: 2 # For prepare_bytecode_report
     steps:
       - checkout
       - attach_workspace:
@@ -1517,6 +1532,7 @@ jobs:
     <<: *base_win
     environment:
       LC_ALL: C
+    parallelism: 2 # For prepare_bytecode_report
     steps:
       # NOTE: For bytecode generation we need the input files to be byte-for-byte identical on all
       # platforms so line ending conversions must absolutely be disabled.
@@ -1553,13 +1569,13 @@ jobs:
     environment:
       REPORT_FILES: |
         bytecode-report-emscripten.txt
-        bytecode-report-ubuntu2004-static-json.txt
+        bytecode-report-ubuntu2004-static-standard-json.txt
         bytecode-report-ubuntu2004-static-cli.txt
-        bytecode-report-ubuntu-json.txt
+        bytecode-report-ubuntu-standard-json.txt
         bytecode-report-ubuntu-cli.txt
-        bytecode-report-osx-json.txt
+        bytecode-report-osx-standard-json.txt
         bytecode-report-osx-cli.txt
-        bytecode-report-windows-json.txt
+        bytecode-report-windows-standard-json.txt
         bytecode-report-windows-cli.txt
     steps:
       - attach_workspace: