diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0afbc759c..a5a1d26a18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 ### Template
 
+- TEMPLATE - add trainling slash for pipelines_testdata_base_path ([#3701](https://github.com/nf-core/tools/pull/3701))
+
 ### Linting
 
 ### Modules
diff --git a/nf_core/pipeline-template/tests/nextflow.config b/nf_core/pipeline-template/tests/nextflow.config
index 8e7b90f0d5..f867b22761 100644
--- a/nf_core/pipeline-template/tests/nextflow.config
+++ b/nf_core/pipeline-template/tests/nextflow.config
@@ -8,7 +8,7 @@
 // Or any resources requirements
 params {
     modules_testdata_base_path = 'https://raw.githubusercontent.com/nf-core/test-datasets/modules/data/'
-    pipelines_testdata_base_path = 'https://raw.githubusercontent.com/nf-core/test-datasets/refs/heads/{{ short_name }}'
+    pipelines_testdata_base_path = 'https://raw.githubusercontent.com/nf-core/test-datasets/refs/heads/{{ short_name }}/'
 }
 
 aws.client.anonymous = true // fixes S3 access issues on self-hosted runners