diff --git a/ci/310-DEV.yaml b/ci/310-DEV.yaml
index 65b4706d..5957810a 100644
--- a/ci/310-DEV.yaml
+++ b/ci/310-DEV.yaml
@@ -13,6 +13,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.12.0
   - shapely>=2
diff --git a/ci/310-numba-DEV.yaml b/ci/310-numba-DEV.yaml
index 5ac5bf12..3d961499 100644
--- a/ci/310-numba-DEV.yaml
+++ b/ci/310-numba-DEV.yaml
@@ -14,6 +14,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.12.0
   - shapely>=2
diff --git a/ci/310.yaml b/ci/310.yaml
index 0304f592..665e6ccc 100644
--- a/ci/310.yaml
+++ b/ci/310.yaml
@@ -14,6 +14,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.7.0
   - shapely>=2
diff --git a/ci/311-DEV.yaml b/ci/311-DEV.yaml
index 56e4f591..49ab5b13 100644
--- a/ci/311-DEV.yaml
+++ b/ci/311-DEV.yaml
@@ -14,6 +14,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # doc build
   - nbsphinx
   - numpydoc
diff --git a/ci/311-numba-DEV.yaml b/ci/311-numba-DEV.yaml
index bbce1352..4d3c3ca9 100644
--- a/ci/311-numba-DEV.yaml
+++ b/ci/311-numba-DEV.yaml
@@ -15,6 +15,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   # doc build
   - nbsphinx
diff --git a/ci/311-numba.yaml b/ci/311-numba.yaml
index b9c10ad9..8ff3645b 100644
--- a/ci/311-numba.yaml
+++ b/ci/311-numba.yaml
@@ -15,6 +15,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.7.0
   - shapely>=2.0
diff --git a/ci/311.yaml b/ci/311.yaml
index 9cff6fbc..df2b04f3 100644
--- a/ci/311.yaml
+++ b/ci/311.yaml
@@ -14,6 +14,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.7.0
   - shapely>=2
diff --git a/ci/38-numba.yaml b/ci/38-numba.yaml
index 4296286f..8672da92 100644
--- a/ci/38-numba.yaml
+++ b/ci/38-numba.yaml
@@ -15,6 +15,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.7.0
   - shapely>=2
diff --git a/ci/38.yaml b/ci/38.yaml
index 6dfed5be..8eeff975 100644
--- a/ci/38.yaml
+++ b/ci/38.yaml
@@ -14,6 +14,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.7.0
   - shapely>=2
diff --git a/ci/39-numba.yaml b/ci/39-numba.yaml
index e46e5bbd..810f187e 100644
--- a/ci/39-numba.yaml
+++ b/ci/39-numba.yaml
@@ -15,6 +15,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.7.0
   - shapely>=2
diff --git a/ci/39.yaml b/ci/39.yaml
index ae8640c9..3df5c819 100644
--- a/ci/39.yaml
+++ b/ci/39.yaml
@@ -14,6 +14,7 @@ dependencies:
   - pytest
   - pytest-cov
   - pytest-xdist
+  - rtree
   # optional
   - geopandas>=0.7.0
   - shapely>=2