test depends, more specific pyproject.toml

.travis.yml

@@ -377,11 +377,11 @@ jobs:
         - PLAT=aarch64
         - ENABLE_CONTRIB=0
         - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.17.3
+        - TEST_DEPENDS=numpy==1.19.0
         - USE_CCACHE=0
       cache:
         directories: $HOME/.ccache
-        
+
     # headless builds for Linux
     - os: linux
       language: generic

pyproject.toml

 [build-system]
 requires = [
   "setuptools", "wheel", "scikit-build", "cmake", "pip",
-  "numpy==1.13.3; python_version=='3.6'",
+  "numpy==1.13.3; python_version=='3.6' and platform_machine != 'aarch64'",
   "numpy==1.19.0; python_version>='3.6' and sys_platform == 'linux' and platform_machine == 'aarch64'",
-  "numpy==1.14.5; python_version=='3.7'",
-  "numpy==1.17.3; python_version=='3.8'",
-  "numpy==1.19.3; python_version>='3.9'"
+  "numpy==1.14.5; python_version=='3.7' and platform_machine != 'aarch64'",
+  "numpy==1.17.3; python_version=='3.8' and platform_machine != 'aarch64'",
+  "numpy==1.19.3; python_version>='3.9' and platform_machine != 'aarch64'"
 ]