diff --git a/testdata-trim/CPrimers.fasta b/testdata-trim/CPrimers.fasta
new file mode 100644
index 000000000..8293d331a
--- /dev/null
+++ b/testdata-trim/CPrimers.fasta
@@ -0,0 +1,2 @@
+>Calpha
+GCGAYGACCACGTTCCCATCT
\ No newline at end of file
diff --git a/testdata-trim/Sample1_R1.fastq.gz b/testdata-trim/Sample1_R1.fastq.gz
new file mode 100755
index 000000000..1cf75ce69
Binary files /dev/null and b/testdata-trim/Sample1_R1.fastq.gz differ
diff --git a/testdata-trim/Sample1_R2.fastq.gz b/testdata-trim/Sample1_R2.fastq.gz
new file mode 100755
index 000000000..12d7064a1
Binary files /dev/null and b/testdata-trim/Sample1_R2.fastq.gz differ
diff --git a/testdata-trim/linker.fasta b/testdata-trim/linker.fasta
new file mode 100644
index 000000000..edfdf75a9
--- /dev/null
+++ b/testdata-trim/linker.fasta
@@ -0,0 +1,4 @@
+>race_linker_1
+GGGG
+>race_linker_2
+AAAAGGGG
\ No newline at end of file
diff --git a/testdata-trim/samplesheet.tsv b/testdata-trim/samplesheet.tsv
new file mode 100644
index 000000000..a9aa0225d
--- /dev/null
+++ b/testdata-trim/samplesheet.tsv
@@ -0,0 +1,2 @@
+sample_id	filename_R1	filename_R2	subject_id	species	pcr_target_locus	treatment	tissue
+Sample1	https://raw.githubusercontent.com/nf-core/test-datasets/airrflow/testdata-trim/Sample1_R1.fastq.gz	https://raw.githubusercontent.com/nf-core/test-datasets/airrflow/testdata-trim/Sample1_R2.fastq.gz	Sample1	mouse	IG	treatment	blood
diff --git a/testdata-trim/umi_pattern.fasta b/testdata-trim/umi_pattern.fasta
new file mode 100644
index 000000000..e8aac19d5
--- /dev/null
+++ b/testdata-trim/umi_pattern.fasta
@@ -0,0 +1,4 @@
+>umi-linker1
+NNNNTNNNNTNNNNTCTTGGGG
+>umi-linker2
+NNNNTNNNNTNNNNTCTTAAAAGGGG