diff --git a/tox.ini b/tox.ini
index 793e2b4..d497990 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,6 +34,8 @@ commands =
   {[testenv:json-api-ref]commands}
   {[testenv:operation-guide]commands}
   {[testenv:json-operation-guide]commands}
+  {[testenv:operation-guide-lts]commands}
+  {[testenv:json-operation-guide-lts]commands}
   {[testenv:umn]commands}
   {[testenv:json-umn]commands}
 
@@ -49,6 +51,7 @@ commands =
   mkdir -p doc/build/pdf
   {[testenv:api-ref-pdf-docs]commands}
   {[testenv:operation-guide-pdf-docs]commands}
+  {[testenv:operation-guide-lts-pdf-docs]commands}
   {[testenv:umn-pdf-docs]commands}
 
 
@@ -138,6 +141,47 @@ commands =
   cp doc/component-operation-guide/build/pdf/mrs-component-operation-guide.pdf doc/build/pdf/
 
 
+# HTML version
+[testenv:operation-guide-lts]
+deps = -r{toxinidir}/doc/requirements.txt
+allowlist_externals =
+  cp
+  mkdir
+commands =
+  sphinx-build -W --keep-going -b html doc/component-operation-guide-lts/source doc/build/html/operation-guide-lts
+
+# Json version (for search)
+[testenv:json-operation-guide-lts]
+deps = -r{toxinidir}/doc/requirements.txt
+allowlist_externals =
+  cp
+  mkdir
+  sh
+commands =
+  sphinx-build -W --keep-going -b json doc/component-operation-guide-lts/source doc/build/json/operation-guide-lts
+  # Drop data useless for the search - wrap it also with sh/xargs due to bugs
+  # in tox
+  sh -c "find doc/build/json -type d -and '(' -name '_images' -or -name '_static' -or -name '_sources' ')' -print0 | xargs -0 rm -rf"
+
+# PDF version
+[testenv:operation-guide-lts-pdf-docs]
+deps = -r{toxinidir}/doc/requirements.txt
+allowlist_externals =
+  rm
+  mkdir
+  make
+  bash
+  cp
+commands =
+  rm -rf doc/component-operation-guide-lts/build/pdf
+  sphinx-build -W --keep-going -b latex doc/component-operation-guide-lts/source doc/component-operation-guide-lts/build/pdf/
+  bash -c "for f in doc/component-operation-guide-lts/build/pdf/*.gif; do convert $f $\{f/%gif/png\}; done || true"
+  bash -c "for f in doc/component-operation-guide-lts/build/pdf/*.tex; do sed -iorig 's/\.gif//g' $f; done"
+  make -C doc/component-operation-guide-lts/build/pdf
+  mkdir -p doc/build/pdf
+  cp doc/component-operation-guide-lts/build/pdf/mrs-component-operation-guide-lts.pdf doc/build/pdf/
+
+
 # HTML version
 [testenv:umn]
 deps = -r{toxinidir}/doc/requirements.txt