diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 26e1159..24676fa 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,18 +12,17 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9"]
+        python-version: ["2.7.18", "3.5.10", "3.6.15", "3.7.17", "3.8.18", "3.9.18",  "3.10.13", "3.11.7", "3.12.1", "3.13.0a2"]
+
+    runs-on: ubuntu-latest
+    container:
+      image: python:${{ matrix.python-version }}-slim
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
+    - uses: actions/checkout@v3
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.gitignore b/.gitignore
index a82da86..03827eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,4 @@ build/
 dist/
 *.egg-info/
 *.py[cod]
+.vscode
diff --git a/README.md b/README.md
index dce792c..809dce8 100644
--- a/README.md
+++ b/README.md
@@ -1082,13 +1082,15 @@ A .prj file, or projection file, is a simple text file that stores a shapefile's
 
 If you're using the same projection over and over, the following is a simple way to create the .prj file assuming your base filename is stored in a variable called "filename":
 
-	>>> with open("{}.prj".format(filename), "w") as prj:
-	>>>     wkt = 'GEOGCS["WGS 84",'
-	>>>     wkt += 'DATUM["WGS_1984",'
-	>>>     wkt += 'SPHEROID["WGS 84",6378137,298.257223563]]'
-	>>>     wkt += ',PRIMEM["Greenwich",0],'
-	>>>     wkt += 'UNIT["degree",0.0174532925199433]]'
-	>>>     prj.write(wkt)
+```
+	with open("{}.prj".format(filename), "w") as prj:
+	    wkt = 'GEOGCS["WGS 84",'
+	    wkt += 'DATUM["WGS_1984",'
+	    wkt += 'SPHEROID["WGS 84",6378137,298.257223563]]'
+	    wkt += ',PRIMEM["Greenwich",0],'
+	    wkt += 'UNIT["degree",0.0174532925199433]]'
+	    prj.write(wkt)
+```
 
 If you need to dynamically fetch WKT projection strings, you can use the pure Python [PyCRS](https://github.com/karimbahgat/PyCRS) module which has a number of useful features. 
 
diff --git a/requirements.test.txt b/requirements.test.txt
index b3eaa8c..27472ef 100644
--- a/requirements.test.txt
+++ b/requirements.test.txt
@@ -1,2 +1,2 @@
-pytest==3.2.5
+pytest
 setuptools