diff --git a/build_utils/pypi_release_tox.ini b/build_utils/pypi_release_tox.ini
index 8b340edf1..a7313c9b4 100644
--- a/build_utils/pypi_release_tox.ini
+++ b/build_utils/pypi_release_tox.ini
@@ -7,13 +7,14 @@ skip_install = True
 
 [testenv]
 changedir = tests_and_analysis/test
-test_command = python {toxinidir}/../tests_and_analysis/test/run_tests.py --report
-requirements_dir = {toxinidir}/../tests_and_analysis
 passenv =
     EUPHONIC_VERSION
 # The name "extras" is reserved and has its own format with newlines:
 # we need a token to inject into custom commands_pre, so call it extras_str
 extras_str = [test,matplotlib,phonopy-reader,brille]
+inst_str =
+    python -m pip install euphonic{[testenv]extras_str}=={env:EUPHONIC_VERSION}
+commands = python {toxinidir}/../tests_and_analysis/test/run_tests.py --report
 
 # Test PyPI source distribution
 [testenv:source-{py310,py312}]
@@ -22,30 +23,14 @@ passenv =
     CC_LD
     LDFLAGS
     CPPFLAGS
-commands_pre =
-    python -m pip install \
-    --force-reinstall \
-    euphonic{[testenv]extras_str}=={env:EUPHONIC_VERSION} \
-    --no-binary 'euphonic'
-commands = {[testenv]test_command}
+commands_pre = {[testenv]inst_str} --no-binary 'euphonic'
 
 [testenv:{py310,py311,py312}]
-commands_pre =
-    python -m pip install \
-    --force-reinstall \
-    euphonic{[testenv]extras_str}=={env:EUPHONIC_VERSION} \
-    --only-binary 'euphonic'
-commands = {[testenv]test_command}
+commands_pre = {[testenv]inst_str} --only-binary 'euphonic'
 
 [testenv:py310-min]
 platform = (linux)|(win32)
 deps =
     numpy==1.24
-    -r{toxinidir}/../tests_and_analysis/tox_requirements.txt
-commands_pre =
-    python -m pip install --force-reinstall \
-        -r{toxinidir}/../tests_and_analysis/minimum_euphonic_requirements.txt
-    python -m pip install \
-    euphonic{[testenv]extras_str}=={env:EUPHONIC_VERSION} \
-    --only-binary 'euphonic'
-commands = {[testenv]test_command}
+    setuptools==60.*
+commands_pre = {[testenv]inst_str} -c {toxinidir}/../tests_and_analysis/minimum_euphonic_requirements.txt --only-binary 'euphonic'
diff --git a/tox.ini b/tox.ini
index 9a168e3a5..9e9798c6a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -61,7 +61,7 @@ extras =
     phonopy-reader
     brille
 commands =
-    {[testenv]test_command} --cov -m multiple_extras
+    {[testenv]test_command} --cov -m "multiple_extras"
 
 [testenv:py310-no-c]
 install_command = {[testenv]install_command} -Csetup-args="-Dpython_only=true"
@@ -71,42 +71,21 @@ extras =
     matplotlib
     phonopy-reader
     brille
-commands = {[testenv]test_command} -m 'not c_extension'
+commands = {[testenv]test_command} -m "not c_extension"
 
-[testenv:py310-minrequirements-linux]
-skip_install = True
-allowlist_externals = rm
-install_command =
-    python -m pip install --force-reinstall {opts} {packages}
-platform = linux
-deps =
-    numpy==1.24.0
-    -r{toxinidir}/tests_and_analysis/tox_requirements.txt
-commands_pre =
-    python -m pip install --force-reinstall \
-        -r{toxinidir}/tests_and_analysis/minimum_euphonic_requirements.txt
-    python -m pip install --force-reinstall \
-        -r{toxinidir}/tests_and_analysis/tox_requirements.txt
-    # Force rebuild of euphonic extension to avoid Numpy clash
-    rm -rf {toxinidir}/build
-    python -m pip install '{toxinidir}[matplotlib,phonopy-reader,brille]'
-commands = {[testenv]test_command}
-
-[testenv:py310-minrequirements-mac]
-skip_install = True
-allowlist_externals = rm
-install_command =
-    python -m pip install --force-reinstall {opts} {packages}
-platform = darwin
+[testenv:py310-minrequirements-{linux,mac}]
+platform =
+    linux: linux
+    mac: darwin
+set_env =
+    linux: PIP_CONSTRAINT={toxinidir}/tests_and_analysis/minimum_euphonic_requirements.txt
+    mac: PIP_CONSTRAINT={toxinidir}/tests_and_analysis/minimum_euphonic_requirements_mac.txt
 deps =
-    numpy==1.24.0
-    -r{toxinidir}/tests_and_analysis/tox_requirements.txt
-commands_pre =
-    python -m pip install --force-reinstall \
-        -r{toxinidir}/tests_and_analysis/minimum_euphonic_requirements_mac.txt
-    python -m pip install --force-reinstall \
-        -r{toxinidir}/tests_and_analysis/tox_requirements.txt
-    # Force rebuild of euphonic extension to avoid Numpy clash
-    rm -rf {toxinidir}/build
-    python -m pip install '{toxinidir}[matplotlib,phonopy-reader,brille]'
-commands = {[testenv]test_command}
+    numpy==1.24
+    setuptools==60.*
+extras =
+    {[testenv]extras}
+    matplotlib
+    phonopy-reader
+    brille
+commands = {[testenv]test_command} -m "multiple_extras"