Use pandas 3.x only for scikit-learn 1.7 and up

Author: PGijsbers

.github/workflows/test.yml

@@ -43,6 +43,12 @@ jobs:
             scikit-learn: "1.3.*"
           - python-version: "3.14"
             scikit-learn: "1.4.*"
+          - python-version: "3.14"
+            scikit-learn: "1.4.*"
+          - python-version: "3.14"
+            scikit-learn: "1.5.*"
+          - python-version: "3.14"
+            scikit-learn: "1.6.*"
 
         include:
           # Full test run on ubuntu, 3.14
@@ -64,14 +70,6 @@ jobs:
             sklearn-only: "false"
             code-cov: true
 
-          # Pandas 2 run
-          - os: ubuntu-latest
-            python-version: "3.12"
-            scikit-learn: "1.5.*"
-            sklearn-only: "false"
-            pandas-version: "2.*"
-            code-cov: false
-
     steps:
     - uses: actions/checkout@v6
       with:
@@ -82,15 +80,17 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - name: Install test dependencies, scikit-learn, and optional pandas
+    - name: Install test dependencies, scikit-learn, and pandas
       shell: bash
       run: |
         python -m pip install --upgrade pip
         pip install -e .[test] scikit-learn==${{ matrix.scikit-learn }}
-        
-        if [ "${{ matrix.pandas-version }}" != "" ]; then
-          echo "Installing specific pandas version: ${{ matrix.pandas-version }}"
-          pip install "pandas==${{ matrix.pandas-version }}"
+
+        # scikit-learn 1.7+ requires pandas 3.x, earlier versions use pandas 2.x
+        if [[ "${{ matrix.scikit-learn }}" == "1.7."* ]]; then
+          pip install "pandas==3.*"
+        else
+          pip install "pandas==2.*"
         fi
 
     - name: Store repository status