diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4771574..c4ca534 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,7 +47,7 @@ jobs:
             profile: "conda"
           - isMaster: false
             profile: "singularity"
-        shard: [1, 2, 3, 4, 5, 6]
+        shard: [1, 2, 3, 4, 5]
     steps:
       - name: Check out pipeline code
         uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
diff --git a/modules.json b/modules.json
index faee1cb..db37526 100644
--- a/modules.json
+++ b/modules.json
@@ -72,7 +72,7 @@
                     },
                     "manta/convertinversion": {
                         "branch": "master",
-                        "git_sha": "1e2b7fb7106852388610c0360d234b0829eb980e",
+                        "git_sha": "81880787133db07d9b4c1febd152c090eb8325dc",
                         "installed_by": ["modules"]
                     },
                     "multiqc": {
diff --git a/modules/nf-core/manta/convertinversion/environment.yml b/modules/nf-core/manta/convertinversion/environment.yml
index c238cf4..3aa535e 100644
--- a/modules/nf-core/manta/convertinversion/environment.yml
+++ b/modules/nf-core/manta/convertinversion/environment.yml
@@ -1,9 +1,9 @@
-name: manta_convertinversion
+---
+# yaml-language-server: $schema=https://raw.githubusercontent.com/nf-core/modules/master/modules/environment-schema.json
 channels:
   - conda-forge
   - bioconda
-  - defaults
 dependencies:
+  - bioconda::htslib=1.16
   - bioconda::manta=1.6.0
   - bioconda::samtools=1.16.1
-  - bioconda::htslib=1.16
diff --git a/modules/nf-core/manta/convertinversion/main.nf b/modules/nf-core/manta/convertinversion/main.nf
index dde263d..462b2e5 100644
--- a/modules/nf-core/manta/convertinversion/main.nf
+++ b/modules/nf-core/manta/convertinversion/main.nf
@@ -33,4 +33,17 @@ process MANTA_CONVERTINVERSION {
         samtools: \$(echo \$(samtools --version 2>&1) | sed 's/^.*samtools //; s/Using.*\$//' )
     END_VERSIONS
     """
+
+    stub:
+    def prefix = task.ext.prefix ?: "${meta.id}"
+    """
+    echo "" | gzip > ${prefix}.vcf.gz
+    touch ${prefix}.vcf.gz.tbi
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        manta: \$( configManta.py --version )
+        samtools: \$(echo \$(samtools --version 2>&1) | sed 's/^.*samtools //; s/Using.*\$//' )
+    END_VERSIONS
+    """
 }
diff --git a/modules/nf-core/manta/convertinversion/meta.yml b/modules/nf-core/manta/convertinversion/meta.yml
index cd1d3ce..3a70814 100644
--- a/modules/nf-core/manta/convertinversion/meta.yml
+++ b/modules/nf-core/manta/convertinversion/meta.yml
@@ -1,5 +1,7 @@
 name: "manta_convertinversion"
-description: Manta calls structural variants (SVs) and indels from mapped paired-end sequencing reads. This script reformats inversions into single inverted sequence junctions which was the format used in Manta versions <= 1.4.0.
+description: Manta calls structural variants (SVs) and indels from mapped paired-end
+  sequencing reads. This script reformats inversions into single inverted sequence
+  junctions which was the format used in Manta versions <= 1.4.0.
 keywords:
   - structural variants
   - conversion
@@ -12,34 +14,52 @@ tools:
       tool_dev_url: https://github.com/Illumina/manta
       doi: "10.1093/bioinformatics/btv710"
       licence: ["GPL v3"]
+      identifier: biotools:manta_sv
 input:
-  - meta:
-      type: map
-      description: |
-        Groovy Map containing sample information
-        e.g. [ id:'test', single_end:false ]
-  - vcf:
-      type: file
-      description: VCF file produces by Manta
-      pattern: "*.vcf.gz"
+  - - meta:
+        type: map
+        description: |
+          Groovy Map containing sample information
+          e.g. [ id:'test', single_end:false ]
+    - vcf:
+        type: file
+        description: VCF file produces by Manta
+        pattern: "*.vcf.gz"
+  - - meta2:
+        type: map
+        description: |
+          Groovy Map containing fasta information
+          e.g. [ id:'test', single_end:false ]
+    - fasta:
+        type: file
+        description: The reference fasta file
+        pattern: "*.{fasta,fa,fna}"
 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"
   - vcf:
-      type: file
-      description: VCF file with reformatted inversions
-      pattern: "*.vcf.gz"
+      - meta:
+          type: map
+          description: |
+            Groovy Map containing sample information
+            e.g. [ id:'test', single_end:false ]
+      - "*.vcf.gz":
+          type: file
+          description: VCF file with reformatted inversions
+          pattern: "*.vcf.gz"
   - tbi:
-      type: file
-      description: TBI file produces by Manta
-      pattern: "*.vcf.gz.tbi"
+      - meta:
+          type: map
+          description: |
+            Groovy Map containing sample information
+            e.g. [ id:'test', single_end:false ]
+      - "*.vcf.gz.tbi":
+          type: file
+          description: TBI file produces by Manta
+          pattern: "*.vcf.gz.tbi"
+  - versions:
+      - versions.yml:
+          type: file
+          description: File containing software versions
+          pattern: "versions.yml"
 authors:
   - "@FriederikeHanssen"
 maintainers:
diff --git a/modules/nf-core/manta/convertinversion/tests/main.nf.test b/modules/nf-core/manta/convertinversion/tests/main.nf.test
new file mode 100644
index 0000000..58adf6e
--- /dev/null
+++ b/modules/nf-core/manta/convertinversion/tests/main.nf.test
@@ -0,0 +1,92 @@
+nextflow_process {
+
+    name "Test Process MANTA_CONVERTINVERSION"
+    script "../main.nf"
+    process "MANTA_CONVERTINVERSION"
+
+    tag "modules"
+    tag "modules_nfcore"
+    tag "manta"
+    tag "manta/convertinversion"
+    tag "manta/tumoronly"
+
+    setup {
+        run("MANTA_TUMORONLY") {
+            script "../../tumoronly/main.nf"
+            process {
+                """
+                input[0] = [
+                    [ id:'test'], // meta map
+                    file(params.modules_testdata_base_path + "genomics/homo_sapiens/illumina/cram/test2.paired_end.recalibrated.sorted.cram"),
+                    file(params.modules_testdata_base_path + "genomics/homo_sapiens/illumina/cram/test2.paired_end.recalibrated.sorted.cram.crai"),
+                    [],
+                    []
+                ]
+                input[1] = [
+                    [ id:'fasta' ],
+                    file(params.modules_testdata_base_path + "genomics/homo_sapiens/genome/chr21/sequence/genome.fasta")
+                ]
+                input[2] = [
+                    [ id:'fai' ],
+                    file(params.modules_testdata_base_path + "genomics/homo_sapiens/genome/chr21/sequence/genome.fasta.fai")
+                ]
+                input[3] = []
+                """
+            }
+        }
+
+    }
+
+    test("homo_sapiens - vcf, fasta") {
+
+        when {
+            process {
+                """
+                input[0] = MANTA_TUMORONLY.out.tumor_sv_vcf
+                input[1] = [
+                    [ id:'fasta' ],
+                    file(params.modules_testdata_base_path + "genomics/homo_sapiens/genome/chr21/sequence/genome.fasta")
+                ]
+                """
+            }
+        }
+
+        then {
+            assertAll(
+                { assert process.success },
+                { assert snapshot(
+                    process.out.vcf.collect { it.collect { it instanceof Map ? it : path(it).linesGzip[-7..-3] } },
+                    process.out.tbi.collect { it.collect { it instanceof Map ? it : file(it).name } },
+                    process.out.versions
+                ).match() }
+            )
+        }
+
+    }
+
+    test("homo_sapiens - vcf, fasta - stub") {
+
+        options "-stub"
+
+        when {
+            process {
+                """
+                input[0] = MANTA_TUMORONLY.out.tumor_sv_vcf
+                input[1] = [
+                    [ id:'fasta' ],
+                    file(params.modules_testdata_base_path + "genomics/homo_sapiens/genome/chr21/sequence/genome.fasta")
+                ]
+                """
+            }
+        }
+
+        then {
+            assertAll(
+                { assert process.success },
+                { assert snapshot(process.out).match("stub") }
+            )
+        }
+
+    }
+
+}
diff --git a/modules/nf-core/manta/convertinversion/tests/main.nf.test.snap b/modules/nf-core/manta/convertinversion/tests/main.nf.test.snap
new file mode 100644
index 0000000..0fba8d6
--- /dev/null
+++ b/modules/nf-core/manta/convertinversion/tests/main.nf.test.snap
@@ -0,0 +1,85 @@
+{
+    "stub": {
+        "content": [
+            {
+                "0": [
+                    [
+                        {
+                            "id": "test"
+                        },
+                        "test.vcf.gz:md5,68b329da9893e34099c7d8ad5cb9c940"
+                    ]
+                ],
+                "1": [
+                    [
+                        {
+                            "id": "test"
+                        },
+                        "test.vcf.gz.tbi:md5,d41d8cd98f00b204e9800998ecf8427e"
+                    ]
+                ],
+                "2": [
+                    "versions.yml:md5,d9a3c2c54bad36a8310d42eae3d57801"
+                ],
+                "tbi": [
+                    [
+                        {
+                            "id": "test"
+                        },
+                        "test.vcf.gz.tbi:md5,d41d8cd98f00b204e9800998ecf8427e"
+                    ]
+                ],
+                "vcf": [
+                    [
+                        {
+                            "id": "test"
+                        },
+                        "test.vcf.gz:md5,68b329da9893e34099c7d8ad5cb9c940"
+                    ]
+                ],
+                "versions": [
+                    "versions.yml:md5,d9a3c2c54bad36a8310d42eae3d57801"
+                ]
+            }
+        ],
+        "meta": {
+            "nf-test": "0.8.4",
+            "nextflow": "24.03.0"
+        },
+        "timestamp": "2024-05-06T10:26:25.996091364"
+    },
+    "homo_sapiens - vcf, fasta": {
+        "content": [
+            [
+                [
+                    {
+                        "id": "test"
+                    },
+                    [
+                        "##FILTER=<ID=MaxMQ0Frac,Description=\"For a small variant (<1000 base), the fraction of reads with MAPQ0 around either breakend exceeds 0.4\">",
+                        "##ALT=<ID=INV,Description=\"Inversion\">",
+                        "##ALT=<ID=DEL,Description=\"Deletion\">",
+                        "##ALT=<ID=INS,Description=\"Insertion\">",
+                        "##ALT=<ID=DUP:TANDEM,Description=\"Tandem Duplication\">"
+                    ]
+                ]
+            ],
+            [
+                [
+                    {
+                        "id": "test"
+                    },
+                    "test.vcf.gz.tbi"
+                ]
+            ],
+            [
+                "versions.yml:md5,d9a3c2c54bad36a8310d42eae3d57801"
+            ]
+        ],
+        "meta": {
+            "nf-test": "0.8.4",
+            "nextflow": "24.03.0"
+        },
+        "timestamp": "2024-05-06T13:34:11.206457972"
+    }
+}
\ No newline at end of file
diff --git a/modules/nf-core/manta/convertinversion/tests/tags.yml b/modules/nf-core/manta/convertinversion/tests/tags.yml
new file mode 100644
index 0000000..14d94b2
--- /dev/null
+++ b/modules/nf-core/manta/convertinversion/tests/tags.yml
@@ -0,0 +1,2 @@
+manta/convertinversion:
+  - "modules/nf-core/manta/convertinversion/**"