more uncommitted changes...

scripts/lint-ts-typings.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 set -e
 
+node="node"
 tsFlags="--strict"
 
-yarn --silent tsc $tsFlags ./packages/babel-types/lib/index.d.ts
+$node ./node_modules/typescript/bin/tsc $tsFlags ./packages/babel-types/lib/index.d.ts

scripts/test-cov.sh

@@ -1,11 +1,10 @@
 #!/bin/bash
 set -e
 
-node="yarn --silent node"
 jestArgs="--coverage"
 
 if [ -n "$CI" ]; then
   jestArgs="${jestArgs} --maxWorkers=4 --ci"
 fi
 
-$node node_modules/.bin/jest $jestArgs
+node_modules/.bin/jest $jestArgs

scripts/test.sh

@@ -1,11 +1,11 @@
 #!/bin/bash
 set -e
 
-node="yarn --silent node"
+node="node"
 jestArgs=()
 
 if [ "$TEST_DEBUG" ]; then
-  node="$node --inspect-brk"
+  node="node --inspect-brk"
   jestArgs+=("--runInBand")
 fi
 
@@ -23,4 +23,4 @@ if [ -n "$TEST_ONLY" ]; then
   jestArgs+=("(packages|codemods|eslint)/.*$TEST_ONLY.*/test")
 fi
 
-$node node_modules/.bin/jest "${jestArgs[@]}"
+$node node_modules/jest/bin/jest.js "${jestArgs[@]}"