diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index 39694fbbd..56f84796f 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -200,54 +200,6 @@ jobs:
       - name: Run simple code
         run: python -c 'import math; print(math.factorial(5))'
 
-  setup-versions-from-standard-pyproject-file-without-parameter:
-    name: Setup ${{ matrix.python }} ${{ matrix.os }} standard pyproject file without parameter
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [macos-latest, windows-latest, ubuntu-20.04, ubuntu-22.04]
-        python: [3.5.4, 3.6.7, 3.7.5, 3.8.15, 3.9.13]
-        exclude:
-          - os: ubuntu-22.04
-            python: 3.5.4
-          - os: ubuntu-22.04
-            python: 3.6.7
-          - os: ubuntu-22.04
-            python: 3.7.5
-          - os: windows-latest
-            python: 3.8.15
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-
-      - name: build-version-file ${{ matrix.python }}
-        run: |
-          echo '[project]
-            requires-python = "${{ matrix.python }}"
-          ' > pyproject.toml
-
-      - name: setup-python ${{ matrix.python }}
-        id: setup-python
-        uses: ./
-
-      - name: Check python-path
-        run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
-        shell: bash
-
-      - name: Validate version
-        run: |
-          $pythonVersion = (python --version)
-          if ("Python ${{ matrix.python }}" -ne "$pythonVersion"){
-            Write-Host "The current version is $pythonVersion; expected version is ${{ matrix.python }}"
-            exit 1
-          }
-          $pythonVersion
-        shell: pwsh
-
-      - name: Run simple code
-        run: python -c 'import math; print(math.factorial(5))'
-
   setup-versions-from-poetry-pyproject-file:
     name: Setup ${{ matrix.python }} ${{ matrix.os }} poetry pyproject file
     runs-on: ${{ matrix.os }}
@@ -298,54 +250,6 @@ jobs:
       - name: Run simple code
         run: python -c 'import math; print(math.factorial(5))'
 
-  setup-versions-from-poetry-pyproject-file-without-parameter:
-    name: Setup ${{ matrix.python }} ${{ matrix.os }} poetry pyproject file without parameter
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [macos-latest, windows-latest, ubuntu-20.04, ubuntu-22.04]
-        python: [3.5.4, 3.6.7, 3.7.5, 3.8.15, 3.9.13]
-        exclude:
-          - os: ubuntu-22.04
-            python: 3.5.4
-          - os: ubuntu-22.04
-            python: 3.6.7
-          - os: ubuntu-22.04
-            python: 3.7.5
-          - os: windows-latest
-            python: 3.8.15
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-
-      - name: build-version-file ${{ matrix.python }}
-        run: |
-          echo '[tool.poetry.dependencies]
-            python = "${{ matrix.python }}"
-          ' > pyproject.toml
-
-      - name: setup-python ${{ matrix.python }}
-        id: setup-python
-        uses: ./
-
-      - name: Check python-path
-        run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
-        shell: bash
-
-      - name: Validate version
-        run: |
-          $pythonVersion = (python --version)
-          if ("Python ${{ matrix.python }}" -ne "$pythonVersion"){
-            Write-Host "The current version is $pythonVersion; expected version is ${{ matrix.python }}"
-            exit 1
-          }
-          $pythonVersion
-        shell: pwsh
-
-      - name: Run simple code
-        run: python -c 'import math; print(math.factorial(5))'
-
   setup-pre-release-version-from-manifest:
     name: Setup 3.9.0-beta.4 ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
diff --git a/dist/setup/index.js b/dist/setup/index.js
index b491ce58e..178a43891 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -69700,7 +69700,6 @@ function cacheDependencies(cache, pythonVersion) {
 function resolveVersionInputFromDefaultFile() {
     const couples = [
         ['.python-version', utils_1.getVersionInputFromPlainFile],
-        ['pyproject.toml', utils_1.getVersionInputFromTomlFile]
     ];
     for (const [versionFile, _fn] of couples) {
         utils_1.logWarning(`Neither 'python-version' nor 'python-version-file' inputs were supplied. Attempting to find '${versionFile}' file.`);
@@ -69975,6 +69974,10 @@ function getOSInfo() {
     });
 }
 exports.getOSInfo = getOSInfo;
+/**
+ * Extract a value from an object by following the keys path provided.
+ * If the value is present, it is returned. Otherwise undefined is returned.
+ */
 function extractValue(obj, keys) {
     if (keys.length > 0) {
         const value = obj[keys[0]];
diff --git a/src/setup-python.ts b/src/setup-python.ts
index dc802697b..ccebc464a 100644
--- a/src/setup-python.ts
+++ b/src/setup-python.ts
@@ -10,8 +10,7 @@ import {
   logWarning,
   IS_MAC,
   getVersionInputFromFile,
-  getVersionInputFromPlainFile,
-  getVersionInputFromTomlFile
+  getVersionInputFromPlainFile
 } from './utils';
 
 function isPyPyVersion(versionSpec: string) {
@@ -32,7 +31,6 @@ async function cacheDependencies(cache: string, pythonVersion: string) {
 function resolveVersionInputFromDefaultFile(): string[] {
   const couples: [string, (versionFile: string) => string[]][] = [
     ['.python-version', getVersionInputFromPlainFile],
-    ['pyproject.toml', getVersionInputFromTomlFile]
   ];
   for (const [versionFile, _fn] of couples) {
     logWarning(