diff --git a/tox.ini b/tox.ini
index c1aabef7b..1ed579bdf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,7 @@ indexserver =
 deps =
     :preinstall: cython
     nose
-    coverage !=5.0.2
+    coverage <5.0
     lzss
     paq
     nltk
@@ -46,11 +46,6 @@ commands = {[testenv:doctest]commands}
 
 [testenv:regression]
 basepython = python3.7
-deps =
-    nose
-    deprecation
-    lzss
-    paq
 commands = nosetests {toxinidir}/tests/regression --processes=-1 \
                --process-timeout=1200 --process-restartworker -c=0 -v []
 
@@ -58,17 +53,10 @@ commands = nosetests {toxinidir}/tests/regression --processes=-1 \
 basepython = python3.6
 deps =
     :preinstall: cython
-    {[testenv:regression]deps}
 commands = {[testenv:regression]commands}
 
 [testenv:fuzz]
 basepython = python3.7
-deps =
-    nose
-    nltk
-    syllabipy
-    lzss
-    paq
 commands = nosetests {toxinidir}/tests/fuzz --processes=-1 \
                --process-timeout=1200 --process-restartworker -c=0 -v []
 
@@ -76,7 +64,6 @@ commands = nosetests {toxinidir}/tests/fuzz --processes=-1 \
 basepython = python3.6
 deps =
     :preinstall: cython
-    {[testenv:fuzz]deps}
 commands = {[testenv:fuzz]commands}
 
 [testenv:black]
@@ -88,6 +75,7 @@ commands = black .
 
 [testenv:pylint]
 basepython = python3.7
+depends = black
 skip_install = true
 deps = pylint
 commands = {toxinidir}/helpers/call_and_write_log.py \
@@ -95,18 +83,21 @@ commands = {toxinidir}/helpers/call_and_write_log.py \
 
 [testenv:pydocstyle]
 basepython = python3.7
+depends = black
 skip_install = true
 deps = pydocstyle
 commands = {toxinidir}/helpers/call_and_write_log.py "pydocstyle --count ." 0
 
 [testenv:pycodestyle]
 basepython = python3.7
+depends = black
 skip_install = true
 deps = pycodestyle
 commands = {toxinidir}/helpers/call_and_write_log.py "pycodestyle ." 0
 
 [testenv:flake8]
 basepython = python3.7
+depends = black
 skip_install = true
 deps =
     flake8
@@ -146,6 +137,7 @@ commands = {toxinidir}/helpers/call_and_write_log.py \
 
 [testenv:doc8]
 basepython = python3.7
+depends = black
 skip_install = true
 deps = doc8
 commands = {toxinidir}/helpers/call_and_write_log.py "doc8 {toxinidir}" 0
@@ -153,12 +145,12 @@ commands = {toxinidir}/helpers/call_and_write_log.py "doc8 {toxinidir}" 0
 [testenv:docs]
 changedir = docs
 basepython = python3.7
+depends = black
 whitelist_externals=make
 deps =
     sphinx
     sphinxcontrib-bibtex
     sphinx_rtd_theme
-    numpy
 commands =
     sphinx-apidoc -e -M -o . ../abydos
     sphinx-build -j 8 -b html -d {envtmpdir}/doctrees . _build/html
@@ -171,6 +163,7 @@ commands =
 
 [testenv:sloccount]
 changedir = {toxinidir}
+depends = black
 skip_install = true
 deps =
 commands = {toxinidir}/helpers/call_and_write_log.py \
@@ -178,12 +171,19 @@ commands = {toxinidir}/helpers/call_and_write_log.py \
 
 [testenv:badges]
 basepython = python3.7
+depends =
+    pylint
+    pydocstyle
+    flake8
+    doc8
+    sloccount
 skip_install = true
 deps =
 commands = python {toxinidir}/badge_update.py
 
 [testenv:build]
 basepython = python3.7
+depends = black
 skip_install = true
 deps =
     wheel
@@ -195,6 +195,7 @@ commands =
 
 [testenv:release]
 basepython = python3.7
+depends = black
 skip_install = true
 deps =
     {[testenv:build]deps}
@@ -204,6 +205,7 @@ commands =
 
 [testenv:release-test]
 basepython = python3.7
+depends = black
 skip_install = true
 deps =
     {[testenv:build]deps}