diff --git a/modules/elprep/filter/main.nf b/modules/elprep/filter/main.nf
new file mode 100644
index 00000000..5ca288bc
--- /dev/null
+++ b/modules/elprep/filter/main.nf
@@ -0,0 +1,89 @@
+process ELPREP_FILTER {
+    tag "$meta.id"
+    label 'process_high'
+
+    conda (params.enable_conda ? "bioconda::elprep=5.1.2" : null)
+    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
+        'https://depot.galaxyproject.org/singularity/elprep:5.1.2--he881be0_0':
+        'quay.io/biocontainers/elprep:5.1.2--he881be0_0' }"
+
+    input:
+    tuple val(meta), path(bam)
+    val(run_haplotypecaller)
+    val(run_bqsr)
+    path(reference_sequences)
+    path(filter_regions_bed)
+    path(reference_elfasta)
+    path(known_sites_elsites)
+    path(target_regions_bed)
+    path(intermediate_bqsr_tables)
+    val(bqsr_tables_only)
+    val(get_activity_profile)
+    val(get_assembly_regions)
+
+
+    output:
+    tuple val(meta), path("output/**.{bam,sam}")    ,emit: bam
+    tuple val(meta), path("*.metrics.txt")          ,optional: true, emit: metrics
+    tuple val(meta), path("*.recall")               ,optional: true, emit: recall
+    tuple val(meta), path("*.vcf.gz")               ,optional: true, emit: gvcf
+    tuple val(meta), path("*.table")                ,optional: true, emit: table
+    tuple val(meta), path("*.activity_profile.igv") ,optional: true, emit: activity_profile
+    tuple val(meta), path("*.assembly_regions.igv") ,optional: true, emit: assembly_regions
+    path "versions.yml"                             ,emit: versions
+
+    when:
+    task.ext.when == null || task.ext.when
+
+    script:
+    def args = task.ext.args ?: ''
+    def prefix = task.ext.prefix ?: "${meta.id}"
+    def suffix = args.contains("--output-type sam") ? "sam" : "bam"
+
+    // filter args
+    def reference_sequences_cmd = reference_sequences ? " --replace-reference-sequences ${reference_sequences}" : ""
+    def filter_regions_cmd      = filter_regions_bed  ? " --filter-non-overlapping-reads ${filter_regions_bed}" : ""
+
+    // markdup args
+    def markdup_cmd = args.contains("--mark-duplicates") ? " --mark-optical-duplicates ${prefix}.metrics.txt": ""
+
+    // variant calling args
+    def haplotyper_cmd = run_haplotypecaller ? " --haplotypecaller ${prefix}.g.vcf.gz": ""
+
+    def fasta_cmd           = reference_elfasta   ? " --reference ${reference_elfasta}": ""
+    def known_sites_cmd     = known_sites_elsites ? " --known-sites ${known_sites_elsites}": ""
+    def target_regions_cmd  = target_regions_bed  ? " --target-regions ${target_regions_bed}": ""
+
+    // bqsr args
+    def bqsr_cmd = run_bqsr ? " --bqsr ${prefix}.recall": ""
+    def bqsr_tables_only_cmd = bqsr_tables_only ? " --bqsr-tables-only ${prefix}.table": ""
+
+    def intermediate_bqsr_cmd = intermediate_bqsr_tables ? " --bqsr-apply .": ""
+
+    // misc
+    def activity_profile_cmd = get_activity_profile ? " --activity-profile ${prefix}.activity_profile.igv": ""
+    def assembly_regions_cmd = get_assembly_regions ? " --assembly-regions ${prefix}.assembly_regions.igv": ""
+
+    """
+    elprep filter ${bam} output/${prefix}.${suffix} \\
+        ${reference_sequences_cmd} \\
+        ${filter_regions_cmd} \\
+        ${markdup_cmd} \\
+        ${haplotyper_cmd} \\
+        ${fasta_cmd} \\
+        ${known_sites_cmd} \\
+        ${target_regions_cmd} \\
+        ${bqsr_cmd} \\
+        ${bqsr_tables_only_cmd} \\
+        ${intermediate_bqsr_cmd} \\
+        ${activity_profile_cmd} \\
+        ${assembly_regions_cmd} \\
+        --nr-of-threads ${task.cpus} \\
+        $args
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        elprep: \$(elprep 2>&1 | head -n2 | tail -n1 |sed 's/^.*version //;s/ compiled.*\$//')
+    END_VERSIONS
+    """
+}
diff --git a/modules/elprep/filter/meta.yml b/modules/elprep/filter/meta.yml
new file mode 100644
index 00000000..d7d41071
--- /dev/null
+++ b/modules/elprep/filter/meta.yml
@@ -0,0 +1,106 @@
+name: "elprep_filter"
+description: "Filter, sort and markdup sam/bam files, with optional BQSR and variant calling."
+keywords:
+  - sort
+  - bam
+  - sam
+  - filter
+  - variant calling
+tools:
+  - "elprep":
+      description: "elPrep is a high-performance tool for preparing .sam/.bam files for variant calling in sequencing pipelines. It can be used as a drop-in replacement for SAMtools/Picard/GATK4."
+      homepage: "https://github.com/ExaScience/elprep"
+      documentation: "https://github.com/ExaScience/elprep"
+      tool_dev_url: "https://github.com/ExaScience/elprep"
+      doi: "10.1371/journal.pone.0244471"
+      licence: "['AGPL v3']"
+
+input:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - bam:
+      type: file
+      description: Input SAM/BAM file
+      pattern: "*.{bam,sam}"
+  - run_haplotypecaller:
+      type: boolean
+      description: Run variant calling on the input files. Needed to generate gvcf output.
+  - run_bqsr:
+      type: boolean
+      description: Run BQSR on the input files. Needed to generate recall metrics.
+  - reference_sequences:
+      type: file
+      description: Optional SAM header to replace existing header.
+      pattern: "*.sam"
+  - filter_regions_bed:
+      type: file
+      description: Optional BED file containing regions to filter.
+      pattern: "*.bed"
+  - reference_elfasta:
+      type: file
+      description: Elfasta file, required for BQSR and variant calling.
+      pattern: "*.elfasta"
+  - known_sites:
+      type: file
+      description: Optional elsites file containing known SNPs for BQSR.
+      pattern: "*.elsites"
+  - target_regions_bed:
+      type: file
+      description: Optional BED file containing target regions for BQSR and variant calling.
+      pattern: "*.bed"
+  - intermediate_bqsr_tables:
+      type: file
+      description: Optional list of BQSR tables, used when parsing files created by `elprep split`
+      pattern: "*.table"
+  - bqsr_tables_only:
+      type: boolean
+      description: Write intermediate BQSR tables, used when parsing files created by `elprep split`.
+  - get_activity_profile:
+      type: boolean
+      description: Get the activity profile calculated by the haplotypecaller to the given file in IGV format.
+  - get_assembly_regions:
+      type: boolean
+      description: Get the assembly regions calculated by haplotypecaller to the speficied file in IGV format.
+output:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - versions:
+      type: file
+      description: File containing software versions
+      pattern: "versions.yml"
+  - bam:
+      type: file
+      description: Sorted, markdup, optionally BQSR BAM/SAM file
+      pattern: "*.{bam,sam}"
+  - metrics:
+      type: file
+      description: Optional duplicate metrics file generated by elprep
+      pattern: "*.{metrics.txt}"
+  - recall:
+      type: file
+      description: Optional recall metrics file generated by elprep
+      pattern: "*.{recall}"
+  - gvcf:
+      type: file
+      description: Optional GVCF output file
+      pattern: "*.{vcf.gz}"
+  - table:
+      type: file
+      description: Optional intermediate BQSR table output file
+      pattern: "*.{table}"
+  - activity_profile:
+      type: file
+      description: Optional activity profile output file
+      pattern: "*.{activity_profile.igv}"
+  - assembly_regions:
+      type: file
+      description: Optional activity regions output file
+      pattern: "*.{assembly_regions.igv}"
+authors:
+  - "@matthdsm"
diff --git a/modules/elprep/split/main.nf b/modules/elprep/split/main.nf
new file mode 100644
index 00000000..639944ef
--- /dev/null
+++ b/modules/elprep/split/main.nf
@@ -0,0 +1,45 @@
+process ELPREP_SPLIT {
+    tag "$meta.id"
+    label 'process_low'
+
+    conda (params.enable_conda ? "bioconda::elprep=5.1.2" : null)
+    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
+        'https://depot.galaxyproject.org/singularity/elprep:5.1.2--he881be0_0':
+        'quay.io/biocontainers/elprep:5.1.2--he881be0_0' }"
+
+    input:
+    tuple val(meta), path(bam)
+
+    output:
+    tuple val(meta), path("output/**.{bam,sam}"), emit: bam
+    path "versions.yml"           , emit: versions
+
+    when:
+    task.ext.when == null || task.ext.when
+
+    script:
+    def args        = task.ext.args ?: ''
+    def prefix      = task.ext.prefix ?: "${meta.id}"
+    def single_end  = meta.single_end ? " --single-end": ""
+
+    """
+    # create directory and move all input so elprep can find and merge them before splitting
+    mkdir input
+    mv ${bam} input/
+
+    mkdir ${prefix}
+
+    elprep split \\
+        input \\
+        output/ \\
+        $args \\
+        $single_end \\
+        --nr-of-threads $task.cpus \\
+        --output-prefix $prefix
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        elprep: \$(elprep 2>&1 | head -n2 | tail -n1 |sed 's/^.*version //;s/ compiled.*\$//')
+    END_VERSIONS
+    """
+}
diff --git a/modules/elprep/split/meta.yml b/modules/elprep/split/meta.yml
new file mode 100644
index 00000000..b99562fa
--- /dev/null
+++ b/modules/elprep/split/meta.yml
@@ -0,0 +1,43 @@
+name: "elprep_split"
+description: Split bam file into manageable chunks
+keywords:
+  - bam
+  - split by chromosome
+tools:
+  - "elprep":
+      description: "elPrep is a high-performance tool for preparing .sam/.bam files for variant calling in sequencing pipelines. It can be used as a drop-in replacement for SAMtools/Picard/GATK4."
+      homepage: "https://github.com/ExaScience/elprep"
+      documentation: "https://github.com/ExaScience/elprep"
+      tool_dev_url: "https://github.com/ExaScience/elprep"
+      doi: "10.1371"
+      licence: "['AGPL v3']"
+
+input:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - bam:
+      type: file
+      description: List of BAM/SAM files
+      pattern: "*.{bam,sam}"
+
+output:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  #
+  - versions:
+      type: file
+      description: File containing software versions
+      pattern: "versions.yml"
+  - bam:
+      type: file
+      description: List of split BAM/SAM files
+      pattern: "*.{bam,sam}"
+
+authors:
+  - "@matthdsm"
diff --git a/modules/kaiju/kaiju2table/main.nf b/modules/kaiju/kaiju2table/main.nf
new file mode 100644
index 00000000..00739d1e
--- /dev/null
+++ b/modules/kaiju/kaiju2table/main.nf
@@ -0,0 +1,40 @@
+process KAIJU_KAIJU2TABLE {
+    tag "$meta.id"
+    label 'process_low'
+
+    conda (params.enable_conda ? "bioconda::kaiju=1.8.2" : null)
+    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
+        'https://depot.galaxyproject.org/singularity/kaiju:1.8.2--h5b5514e_1':
+        'quay.io/biocontainers/kaiju:1.8.2--h2e03b76_0' }"
+
+    input:
+    tuple val(meta), path(results)
+    path db
+    val taxon_rank
+
+    output:
+    tuple val(meta), path('*.txt'), emit: summary
+    path "versions.yml"           , emit: versions
+
+    when:
+    task.ext.when == null || task.ext.when
+
+    script:
+    def args = task.ext.args ?: ''
+    def prefix = task.ext.prefix ?: "${meta.id}"
+    """
+    dbnodes=`find -L ${db} -name "*nodes.dmp"`
+    dbname=`find -L ${db} -name "*.fmi" -not -name "._*"`
+    kaiju2table   $args \\
+        -t \$dbnodes \\
+        -n \$dbname \\
+        -r ${taxon_rank} \\
+        -o ${prefix}.txt \\
+        ${results}
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        kaiju: \$(echo \$( kaiju -h 2>&1 | sed -n 1p | sed 's/^.*Kaiju //' ))
+    END_VERSIONS
+    """
+}
diff --git a/modules/kaiju/kaiju2table/meta.yml b/modules/kaiju/kaiju2table/meta.yml
new file mode 100644
index 00000000..bc3e85d7
--- /dev/null
+++ b/modules/kaiju/kaiju2table/meta.yml
@@ -0,0 +1,50 @@
+name: "kaiju_kaiju2table"
+description: write your description here
+keywords:
+  - classify
+  - metagenomics
+tools:
+  - kaiju:
+      description: Fast and sensitive taxonomic classification for metagenomics
+      homepage: https://kaiju.binf.ku.dk/
+      documentation: https://github.com/bioinformatics-centre/kaiju/blob/master/README.md
+      tool_dev_url: https://github.com/bioinformatics-centre/kaiju
+      doi: "10.1038/ncomms11257"
+      licence: ["GNU GPL v3"]
+
+input:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - results:
+      type: file
+      description: File containing the kaiju classification results
+      pattern: "*.{txt}"
+  - taxon_rank:
+      type: string
+      description: |
+        Taxonomic rank to display in report
+        pattern: "phylum|class|order|family|genus|species"
+
+output:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - versions:
+      type: file
+      description: File containing software versions
+      pattern: "versions.yml"
+  - results:
+      type: file
+      description: |
+        Summary table for a given taxonomic rank
+      pattern: "*.{tsv}"
+
+authors:
+  - "@sofstam"
+  - "@talnor"
+  - "@jfy133"
diff --git a/modules/picard/collecthsmetrics/main.nf b/modules/picard/collecthsmetrics/main.nf
index 3acf8bb8..ef7a9b9f 100644
--- a/modules/picard/collecthsmetrics/main.nf
+++ b/modules/picard/collecthsmetrics/main.nf
@@ -15,8 +15,8 @@ process PICARD_COLLECTHSMETRICS {
     path target_intervals
 
     output:
-    tuple val(meta), path("*collecthsmetrics.txt"), emit: hs_metrics
-    path "versions.yml"                           , emit: versions
+    tuple val(meta), path("*_metrics")  , emit: metrics
+    path "versions.yml"                 , emit: versions
 
     when:
     task.ext.when == null || task.ext.when
@@ -41,7 +41,8 @@ process PICARD_COLLECTHSMETRICS {
         -BAIT_INTERVALS $bait_intervals \\
         -TARGET_INTERVALS $target_intervals \\
         -INPUT $bam \\
-        -OUTPUT ${prefix}_collecthsmetrics.txt
+        -OUTPUT ${prefix}.CollectHsMetrics.coverage_metrics
+
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
@@ -52,7 +53,7 @@ process PICARD_COLLECTHSMETRICS {
     stub:
     def prefix = task.ext.prefix ?: "${meta.id}"
     """
-    touch ${prefix}_collecthsmetrics.txt
+    touch ${prefix}.CollectHsMetrics.coverage_metrics
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
diff --git a/modules/picard/collecthsmetrics/meta.yml b/modules/picard/collecthsmetrics/meta.yml
index 4b94909f..dc9d647a 100644
--- a/modules/picard/collecthsmetrics/meta.yml
+++ b/modules/picard/collecthsmetrics/meta.yml
@@ -57,10 +57,11 @@ output:
       type: file
       description: File containing software versions
       pattern: "versions.yml"
-  - hs_metrics:
+  - metrics:
       type: file
-      description: The metrics file.
-      pattern: "*_collecthsmetrics.txt"
+      description: Alignment metrics files generated by picard
+      pattern: "*_{metrics}"
 
 authors:
   - "@projectoriented"
+  - "@matthdsm"
diff --git a/modules/samtools/view/main.nf b/modules/samtools/view/main.nf
index 5f14fbbf..11cfb74b 100644
--- a/modules/samtools/view/main.nf
+++ b/modules/samtools/view/main.nf
@@ -8,7 +8,7 @@ process SAMTOOLS_VIEW {
         'quay.io/biocontainers/samtools:1.15.1--h1170115_0' }"
 
     input:
-    tuple val(meta), path(input)
+    tuple val(meta), path(input), path(index)
     path fasta
 
     output:
diff --git a/modules/samtools/view/meta.yml b/modules/samtools/view/meta.yml
index 5604bfa7..a8b43ecc 100644
--- a/modules/samtools/view/meta.yml
+++ b/modules/samtools/view/meta.yml
@@ -25,6 +25,10 @@ input:
       type: file
       description: BAM/CRAM/SAM file
       pattern: "*.{bam,cram,sam}"
+  - index:
+      type: optional file
+      description: BAM.BAI/CRAM.CRAI file
+      pattern: "*.{.bai,.crai}"
   - fasta:
       type: optional file
       description: Reference file the CRAM was created with
diff --git a/modules/stranger/main.nf b/modules/stranger/main.nf
index 55678bd3..ddfa0070 100644
--- a/modules/stranger/main.nf
+++ b/modules/stranger/main.nf
@@ -33,4 +33,15 @@ process STRANGER {
         stranger: \$( stranger --version )
     END_VERSIONS
     """
+
+    stub:
+    def prefix = task.ext.prefix ?: "${meta.id}"
+    """
+    touch ${prefix}.vcf.gz
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        stranger: \$( stranger --version )
+    END_VERSIONS
+    """
 }
diff --git a/tests/config/pytest_modules.yml b/tests/config/pytest_modules.yml
index 4d7ba4fd..c33b626e 100644
--- a/tests/config/pytest_modules.yml
+++ b/tests/config/pytest_modules.yml
@@ -599,6 +599,14 @@ ectyper:
   - modules/ectyper/**
   - tests/modules/ectyper/**
 
+elprep/filter:
+  - modules/elprep/filter/**
+  - tests/modules/elprep/filter/**
+
+elprep/split:
+  - modules/elprep/split/**
+  - tests/modules/elprep/split/**
+
 emmtyper:
   - modules/emmtyper/**
   - tests/modules/emmtyper/**
@@ -1001,6 +1009,10 @@ kaiju/kaiju:
   - modules/kaiju/kaiju/**
   - tests/modules/kaiju/kaiju/**
 
+kaiju/kaiju2table:
+  - modules/kaiju/kaiju2table/**
+  - tests/modules/kaiju/kaiju2table/**
+
 kallisto/index:
   - modules/kallisto/index/**
   - tests/modules/kallisto/index/**
diff --git a/tests/config/test_data.config b/tests/config/test_data.config
index ea123732..559c0d6f 100644
--- a/tests/config/test_data.config
+++ b/tests/config/test_data.config
@@ -112,6 +112,7 @@ params {
         }
         'homo_sapiens' {
             'genome' {
+                genome_elfasta                                 = "${test_data_dir}/genomics/homo_sapiens/genome/genome.elfasta"
                 genome_fasta                                   = "${test_data_dir}/genomics/homo_sapiens/genome/genome.fasta"
                 genome_fasta_fai                               = "${test_data_dir}/genomics/homo_sapiens/genome/genome.fasta.fai"
                 genome_dict                                    = "${test_data_dir}/genomics/homo_sapiens/genome/genome.dict"
@@ -123,6 +124,7 @@ params {
                 genome_header                                  = "${test_data_dir}/genomics/homo_sapiens/genome/genome.header"
                 genome_bed_gz                                  = "${test_data_dir}/genomics/homo_sapiens/genome/genome.bed.gz"
                 genome_bed_gz_tbi                              = "${test_data_dir}/genomics/homo_sapiens/genome/genome.bed.gz.tbi"
+                genome_elsites                                 = "${test_data_dir}/genomics/homo_sapiens/genome/genome.elsites"
                 transcriptome_fasta                            = "${test_data_dir}/genomics/homo_sapiens/genome/transcriptome.fasta"
                 genome2_fasta                                  = "${test_data_dir}/genomics/homo_sapiens/genome/genome2.fasta"
                 genome_chain_gz                                = "${test_data_dir}/genomics/homo_sapiens/genome/genome.chain.gz"
@@ -136,6 +138,7 @@ params {
                 genome_21_multi_interval_bed_gz_tbi            = "${test_data_dir}/genomics/homo_sapiens/genome/chr21/sequence/multi_intervals.bed.gz.tbi"
                 genome_21_chromosomes_dir                      = "${test_data_dir}/genomics/homo_sapiens/genome/chr21/sequence/chromosomes.tar.gz"
 
+                dbsnp_146_hg38_elsites                         = "${test_data_dir}/genomics/homo_sapiens/genome/vcf/dbsnp_146.hg38.elsites"
                 dbsnp_146_hg38_vcf_gz                          = "${test_data_dir}/genomics/homo_sapiens/genome/vcf/dbsnp_146.hg38.vcf.gz"
                 dbsnp_146_hg38_vcf_gz_tbi                      = "${test_data_dir}/genomics/homo_sapiens/genome/vcf/dbsnp_146.hg38.vcf.gz.tbi"
                 gnomad_r2_1_1_vcf_gz                           = "${test_data_dir}/genomics/homo_sapiens/genome/vcf/gnomAD.r2.1.1.vcf.gz"
diff --git a/tests/modules/elprep/filter/main.nf b/tests/modules/elprep/filter/main.nf
new file mode 100644
index 00000000..0a8d43ca
--- /dev/null
+++ b/tests/modules/elprep/filter/main.nf
@@ -0,0 +1,18 @@
+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl = 2
+
+include { ELPREP_FILTER } from '../../../../modules/elprep/filter/main.nf'
+
+workflow test_elprep_filter {
+
+    input = [
+        [ id:'test', single_end:false ], // meta map
+        file(params.test_data['homo_sapiens']['illumina']['test_paired_end_sorted_bam'], checkIfExists: true)
+    ]
+    reference_elfasta = file(params.test_data['homo_sapiens']['genome']['genome_elfasta'], checkIfExists: true)
+    known_sites_elsites = file(params.test_data['homo_sapiens']['genome']['dbsnp_146_hg38_elsites'], checkIfExists: true)
+    target_regions_bed = file(params.test_data['homo_sapiens']['genome']['genome_bed'], checkIfExists: true)
+
+    ELPREP_FILTER ( input, true, true, [],  [], reference_elfasta, known_sites_elsites, target_regions_bed, [], [], true, true)
+}
diff --git a/tests/modules/elprep/filter/nextflow.config b/tests/modules/elprep/filter/nextflow.config
new file mode 100644
index 00000000..d53a3d2d
--- /dev/null
+++ b/tests/modules/elprep/filter/nextflow.config
@@ -0,0 +1,7 @@
+process {
+
+    publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }
+    withName: ELPREP_FILTER {
+        ext.args = "--mark-duplicates "
+    }
+}
diff --git a/tests/modules/elprep/filter/test.yml b/tests/modules/elprep/filter/test.yml
new file mode 100644
index 00000000..922d7a9b
--- /dev/null
+++ b/tests/modules/elprep/filter/test.yml
@@ -0,0 +1,13 @@
+- name: elprep filter test_elprep_filter
+  command: nextflow run tests/modules/elprep/filter -entry test_elprep_filter -c tests/config/nextflow.config
+  tags:
+    - elprep
+    - elprep/filter
+  files:
+    - path: output/elprep/test.activity_profile.igv
+    - path: output/elprep/test.assembly_regions.igv
+    - path: output/elprep/output/test.bam
+    - path: output/elprep/test.g.vcf.gz
+    - path: output/elprep/test.metrics.txt
+    - path: output/elprep/test.recall
+    - path: output/elprep/versions.yml
diff --git a/tests/modules/elprep/split/main.nf b/tests/modules/elprep/split/main.nf
new file mode 100644
index 00000000..d5a111de
--- /dev/null
+++ b/tests/modules/elprep/split/main.nf
@@ -0,0 +1,15 @@
+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl = 2
+
+include { ELPREP_SPLIT } from '../../../../modules/elprep/split/main.nf'
+
+workflow test_elprep_split {
+
+    input = [
+        [ id:'test', single_end:false ], // meta map
+        file(params.test_data['homo_sapiens']['illumina']['test_paired_end_sorted_bam'], checkIfExists: true)
+    ]
+
+    ELPREP_SPLIT ( input )
+}
diff --git a/tests/modules/elprep/split/nextflow.config b/tests/modules/elprep/split/nextflow.config
new file mode 100644
index 00000000..a3ae0169
--- /dev/null
+++ b/tests/modules/elprep/split/nextflow.config
@@ -0,0 +1,9 @@
+process {
+
+    publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }
+
+    withName : ELPREP_SPLIT {
+        ext.args = "--contig-group-size 1 --output-type bam"
+    }
+
+}
diff --git a/tests/modules/elprep/split/test.yml b/tests/modules/elprep/split/test.yml
new file mode 100644
index 00000000..2de3f99b
--- /dev/null
+++ b/tests/modules/elprep/split/test.yml
@@ -0,0 +1,10 @@
+- name: elprep split test_elprep_split
+  command: nextflow run tests/modules/elprep/split -entry test_elprep_split -c tests/config/nextflow.config
+  tags:
+    - elprep
+    - elprep/split
+  files:
+    - path: output/elprep/output/splits/test-group00001.bam
+    - path: output/elprep/output/splits/test-unmapped.bam
+    - path: output/elprep/output/test-spread.bam
+    - path: output/elprep/versions.yml
diff --git a/tests/modules/kaiju/kaiju2table/main.nf b/tests/modules/kaiju/kaiju2table/main.nf
new file mode 100644
index 00000000..b7169ba5
--- /dev/null
+++ b/tests/modules/kaiju/kaiju2table/main.nf
@@ -0,0 +1,21 @@
+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl = 2
+
+include { UNTAR             } from '../../../../modules/untar/main.nf'
+include { KAIJU_KAIJU       } from '../../../../modules/kaiju/kaiju/main.nf'
+include { KAIJU_KAIJU2TABLE } from '../../../../modules/kaiju/kaiju2table/main.nf'
+
+workflow test_kaiju_kaiju_single_end {
+
+    input = [
+        [ id:'test', single_end:true ], // meta map
+        file(params.test_data['sarscov2']['illumina']['test_1_fastq_gz'], checkIfExists: true)
+    ]
+    db    = [ [], file(params.test_data['sarscov2']['genome']['kaiju_tar_gz'], checkIfExists: true) ]
+    taxon_rank = "species"
+
+    ch_db = UNTAR ( db )
+    KAIJU_KAIJU ( input, ch_db.untar.map{ it[1] } )
+    KAIJU_KAIJU2TABLE ( KAIJU_KAIJU.out.results, ch_db.untar.map{ it[1] }, taxon_rank )
+}
diff --git a/tests/modules/kaiju/kaiju2table/nextflow.config b/tests/modules/kaiju/kaiju2table/nextflow.config
new file mode 100644
index 00000000..50f50a7a
--- /dev/null
+++ b/tests/modules/kaiju/kaiju2table/nextflow.config
@@ -0,0 +1,5 @@
+process {
+
+    publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }
+    
+}
\ No newline at end of file
diff --git a/tests/modules/kaiju/kaiju2table/test.yml b/tests/modules/kaiju/kaiju2table/test.yml
new file mode 100644
index 00000000..47d99c89
--- /dev/null
+++ b/tests/modules/kaiju/kaiju2table/test.yml
@@ -0,0 +1,9 @@
+- name: kaiju kaiju2table test_kaiju_kaiju_single_end
+  command: nextflow run tests/modules/kaiju/kaiju2table -entry test_kaiju_kaiju_single_end -c tests/config/nextflow.config
+  tags:
+    - kaiju
+    - kaiju/kaiju2table
+  files:
+    - path: output/kaiju/test.txt
+      md5sum: 0d9f8fd36fcf2888296ae12632c5f0a8
+    - path: output/kaiju/versions.yml
diff --git a/tests/modules/picard/collecthsmetrics/main.nf b/tests/modules/picard/collecthsmetrics/main.nf
index 2e8727b5..a28eb174 100644
--- a/tests/modules/picard/collecthsmetrics/main.nf
+++ b/tests/modules/picard/collecthsmetrics/main.nf
@@ -7,7 +7,7 @@ include { PICARD_COLLECTHSMETRICS } from '../../../../modules/picard/collecthsme
 workflow test_picard_collecthsmetrics {
 
     input = [ [ id:'test', single_end:false ], // meta map
-              file(params.test_data['sarscov2']['illumina']['test_paired_end_bam'], checkIfExists: true) ]
+            file(params.test_data['sarscov2']['illumina']['test_paired_end_bam'], checkIfExists: true) ]
 
     fasta = file(params.test_data['sarscov2']['genome']['genome_fasta'], checkIfExists: true)
     fai = file(params.test_data['sarscov2']['genome']['genome_fasta_fai'], checkIfExists: true)
diff --git a/tests/modules/picard/collecthsmetrics/test.yml b/tests/modules/picard/collecthsmetrics/test.yml
index 9232d508..9aa14f15 100644
--- a/tests/modules/picard/collecthsmetrics/test.yml
+++ b/tests/modules/picard/collecthsmetrics/test.yml
@@ -5,4 +5,4 @@
     - picard/collecthsmetrics
   files:
     # The file can't be md5'd consistently
-    - path: output/picard/test_collecthsmetrics.txt
+    - path: output/picard/test.CollectHsMetrics.coverage_metrics
diff --git a/tests/modules/samtools/view/main.nf b/tests/modules/samtools/view/main.nf
index 8ee27ef8..9c239066 100644
--- a/tests/modules/samtools/view/main.nf
+++ b/tests/modules/samtools/view/main.nf
@@ -6,7 +6,8 @@ include { SAMTOOLS_VIEW } from '../../../../modules/samtools/view/main.nf'
 
 workflow test_samtools_view {
     input = [ [ id:'test', single_end:false ], // meta map
-                file(params.test_data['sarscov2']['illumina']['test_paired_end_bam'], checkIfExists: true)
+                file(params.test_data['sarscov2']['illumina']['test_paired_end_bam'], checkIfExists: true),
+                []
             ]
 
     SAMTOOLS_VIEW ( input, [] )
@@ -14,8 +15,8 @@ workflow test_samtools_view {
 
 workflow test_samtools_view_cram {
    input = [ [ id: 'test' ], // meta map
-               file(params.test_data['homo_sapiens']['illumina']['test_paired_end_recalibrated_sorted_cram'], checkIfExists: true),
-               file(params.test_data['homo_sapiens']['illumina']['test_paired_end_recalibrated_sorted_cram_crai'], checkIfExists: true)
+                file(params.test_data['homo_sapiens']['illumina']['test_paired_end_recalibrated_sorted_cram'], checkIfExists: true),
+                file(params.test_data['homo_sapiens']['illumina']['test_paired_end_recalibrated_sorted_cram_crai'], checkIfExists: true)
             ]
     fasta   = file(params.test_data['homo_sapiens']['genome']['genome_fasta'], checkIfExists: true)
 
diff --git a/tests/modules/stranger/main.nf b/tests/modules/stranger/main.nf
index 5bd6766b..4a930c19 100644
--- a/tests/modules/stranger/main.nf
+++ b/tests/modules/stranger/main.nf
@@ -23,3 +23,8 @@ workflow test_stranger_without_optional_variant_catalog {
     EXPANSIONHUNTER ( input, fasta, variant_catalog )
     STRANGER ( EXPANSIONHUNTER.out.vcf, [] )
 }
+
+workflow test_stranger_without_optional_variant_catalog_stubs {
+    EXPANSIONHUNTER ( input, fasta, variant_catalog )
+    STRANGER ( EXPANSIONHUNTER.out.vcf, [] )
+}
diff --git a/tests/modules/stranger/test.yml b/tests/modules/stranger/test.yml
index c7a6972e..bf922c86 100644
--- a/tests/modules/stranger/test.yml
+++ b/tests/modules/stranger/test.yml
@@ -25,3 +25,13 @@
       md5sum: bbe15159195681d5c18596d3ad85c78f
     - path: output/stranger/versions.yml
       md5sum: 8558542a007e90ea5dcdceed3f12585d
+
+- name: stranger test_stranger_without_optional_variant_catalog_stubs
+  command: nextflow run tests/modules/stranger -entry test_stranger_without_optional_variant_catalog -c tests/config/nextflow.config -stub-run
+  tags:
+    - stranger
+  files:
+    - path: output/expansionhunter/test.vcf
+    - path: output/expansionhunter/versions.yml
+    - path: output/stranger/test.vcf.gz
+    - path: output/stranger/versions.yml