diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4cb2ba1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+# tests coverage output
+coverage
+coverage.json
diff --git a/.solcover.js b/.solcover.js
new file mode 100644
index 0000000..6394f15
--- /dev/null
+++ b/.solcover.js
@@ -0,0 +1,14 @@
+module.exports = {
+  skipFiles: [
+    './carbon',
+  ],
+  modifierWhitelist: ['initializer'],
+  onCompileComplete: async () => {
+    const { spawn } = require('child_process')
+    const child = spawn('pnpm', ['build:typechain'])
+    await new Promise((res, rej) => {
+      child.on('exit', res)
+      child.on('error', rej)
+    });
+  },
+}
diff --git a/package.json b/package.json
index 8363d6c..e9745ba 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "test:unit": "mocha 'test/**/*.test.ts'",
     "test": "pnpm test:unit",
     "test:ci": "pnpm run test",
+    "coverage": "hardhat coverage --testfiles test/contracts/**/*.test.ts",
     "deploy:contracts": "bash ./scripts/guardedRun.sh"
   },
   "prettier": "prettier-config-archblock/contracts.json",
diff --git a/test/contracts/configure.test.ts b/test/contracts/configure.test.ts
index e313ff5..a076046 100644
--- a/test/contracts/configure.test.ts
+++ b/test/contracts/configure.test.ts
@@ -14,7 +14,7 @@ describe('MinimumDepositController.configure', () => {
   it('changes multiple values', async () => {
     const { depositController } = await loadFixture(minimumDepositControllerFixture)
     const status = PortfolioStatus.Live
-    const depositAllowed = false
+    const depositAllowed = !(await depositController.depositAllowed(status))
 
     await depositController.configure(ceiling, depositFeeRate, minimumDeposit, lenderVerifierAddress, {
       status,
@@ -44,4 +44,24 @@ describe('MinimumDepositController.configure', () => {
     expect(await depositController.minimumDeposit()).to.eq(minimumDeposit)
     expect(await depositController.lenderVerifier()).to.eq(lenderVerifierAddress)
   })
+
+  it('can be called by anyone when not changing values', async () => {
+    const { depositController, other } = await loadFixture(minimumDepositControllerFixture)
+
+    const status = PortfolioStatus.Live
+    const ceiling = await depositController.ceiling()
+    const depositFeeRate = await depositController.depositFeeRate()
+    const minimumDeposit = await depositController.minimumDeposit()
+    const lenderVerifierAddress = await depositController.lenderVerifier()
+    const depositAllowed = await depositController.depositAllowed(status)
+
+    const controllerAsOther = depositController.connect(other)
+
+    expect(
+      await controllerAsOther.configure(ceiling, depositFeeRate, minimumDeposit, lenderVerifierAddress, {
+        status,
+        value: depositAllowed,
+      }),
+    ).not.to.be.reverted
+  })
 })
diff --git a/test/contracts/maxDeposit.test.ts b/test/contracts/maxDeposit.test.ts
new file mode 100644
index 0000000..05e5728
--- /dev/null
+++ b/test/contracts/maxDeposit.test.ts
@@ -0,0 +1,42 @@
+import { setupFixtureLoader } from 'test/setup'
+import { PortfolioStatus, structuredPortfolioFixture } from 'fixtures/structuredPortfolioFixture'
+import { parseUSDC } from 'utils'
+import { expect } from 'chai'
+import { MinimumDepositController__factory } from 'build/types'
+
+describe('MinimumDepositController.maxDeposit', () => {
+  const loadFixture = setupFixtureLoader()
+  const minimumDeposit = parseUSDC(100)
+  const ceiling = parseUSDC(5e9)
+
+  it('previews max deposit', async () => {
+    const { equityTranche, wallet } = await loadFixture(structuredPortfolioFixture(minimumDeposit))
+
+    expect(await equityTranche.maxDeposit(wallet.address)).to.eq(ceiling)
+  })
+
+  it('previews current max deposit', async () => {
+    const { equityTranche, wallet, depositToTranche } = await loadFixture(structuredPortfolioFixture(minimumDeposit))
+    await depositToTranche(equityTranche, minimumDeposit)
+
+    expect(await equityTranche.maxDeposit(wallet.address)).to.eq(ceiling.sub(minimumDeposit))
+  })
+
+  it('returns zero if deposit is not allowed', async () => {
+    const { equityTranche, wallet } = await loadFixture(structuredPortfolioFixture(minimumDeposit))
+    const depositController = MinimumDepositController__factory.connect(await equityTranche.depositController(), wallet)
+    await depositController.setDepositAllowed(false, PortfolioStatus.CapitalFormation)
+
+    expect(await equityTranche.maxDeposit(wallet.address)).to.eq(0)
+  })
+
+  it('returns zero if tranche is full', async () => {
+    const { equityTranche, wallet, depositToTranche } = await loadFixture(structuredPortfolioFixture(minimumDeposit))
+    const depositController = MinimumDepositController__factory.connect(await equityTranche.depositController(), wallet)
+    const amount = parseUSDC(150)
+    await depositController.setCeiling(amount)
+    await depositToTranche(equityTranche, amount)
+
+    expect(await equityTranche.maxDeposit(wallet.address)).to.eq(0)
+  })
+})
diff --git a/test/contracts/previewMint.test.ts b/test/contracts/previewMint.test.ts
new file mode 100644
index 0000000..903415c
--- /dev/null
+++ b/test/contracts/previewMint.test.ts
@@ -0,0 +1,16 @@
+import { setupFixtureLoader } from 'test/setup'
+import { structuredPortfolioFixture } from 'fixtures/structuredPortfolioFixture'
+import { parseUSDC } from 'utils'
+import { expect } from 'chai'
+
+describe('MinimumDepositController.previewMint', () => {
+  const loadFixture = setupFixtureLoader()
+  const minimumDeposit = parseUSDC(100)
+
+  it('previews the mint amount', async () => {
+    const { equityTranche } = await loadFixture(structuredPortfolioFixture(minimumDeposit))
+    const amount = parseUSDC(100)
+
+    expect(await equityTranche.previewMint(amount)).to.eq(amount)
+  })
+})