diff --git a/test/e2e/bun.e2e.spec.js b/test/e2e/bun.e2e.spec.js
index fb6e99a..c4d2e25 100644
--- a/test/e2e/bun.e2e.spec.js
+++ b/test/e2e/bun.e2e.spec.js
@@ -46,8 +46,9 @@ describe("E2E: bun coverage", () => {
 
     var result = await shell.runCommand("bun install");
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
@@ -65,8 +66,9 @@ describe("E2E: bun coverage", () => {
 
     const result = await shell.runCommand("bunx safe-chain-test");
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
diff --git a/test/e2e/npm.e2e.spec.js b/test/e2e/npm.e2e.spec.js
index e8ba7c8..c1a09ab 100644
--- a/test/e2e/npm.e2e.spec.js
+++ b/test/e2e/npm.e2e.spec.js
@@ -70,8 +70,9 @@ describe("E2E: npm coverage", () => {
 
     var result = await shell.runCommand("npm install");
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
diff --git a/test/e2e/pip.e2e.spec.js b/test/e2e/pip.e2e.spec.js
index af979dc..ecf8ad9 100644
--- a/test/e2e/pip.e2e.spec.js
+++ b/test/e2e/pip.e2e.spec.js
@@ -131,8 +131,9 @@ describe("E2E: pip coverage", () => {
       "pip3 install --break-system-packages numpy==2.4.4 --safe-chain-logging=verbose"
     );
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads:"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads:/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
diff --git a/test/e2e/pnpm.e2e.spec.js b/test/e2e/pnpm.e2e.spec.js
index a15250a..4411492 100644
--- a/test/e2e/pnpm.e2e.spec.js
+++ b/test/e2e/pnpm.e2e.spec.js
@@ -70,8 +70,9 @@ describe("E2E: pnpm coverage", () => {
 
     var result = await shell.runCommand("pnpm install");
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
diff --git a/test/e2e/safe-chain-cli-python.e2e.spec.js b/test/e2e/safe-chain-cli-python.e2e.spec.js
index cf3fda2..9d59fb3 100644
--- a/test/e2e/safe-chain-cli-python.e2e.spec.js
+++ b/test/e2e/safe-chain-cli-python.e2e.spec.js
@@ -100,8 +100,9 @@ describe("E2E: safe-chain CLI python/pip support", () => {
       "safe-chain pip3 install --break-system-packages numpy==2.4.4"
     );
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads/,
       `Should have blocked malware. Output was:\n${result.output}`
     );
   });
diff --git a/test/e2e/uv.e2e.spec.js b/test/e2e/uv.e2e.spec.js
index 5536e22..8fd633a 100644
--- a/test/e2e/uv.e2e.spec.js
+++ b/test/e2e/uv.e2e.spec.js
@@ -129,8 +129,9 @@ describe("E2E: uv coverage", () => {
       "uv pip install --system --break-system-packages numpy==2.4.4"
     );
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads:"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads:/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
@@ -416,8 +417,9 @@ describe("E2E: uv coverage", () => {
       "cd test-project-malware && uv add numpy==2.4.4"
     );
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads:"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads:/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
@@ -447,8 +449,9 @@ describe("E2E: uv coverage", () => {
     const shell = await container.openShell("zsh");
     const result = await shell.runCommand("uv tool install numpy==2.4.4");
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads:"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads:/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(
@@ -485,8 +488,9 @@ describe("E2E: uv coverage", () => {
       "uv run --with numpy==2.4.4 test_script2.py"
     );
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads:"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads:/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
   });
diff --git a/test/e2e/yarn.e2e.spec.js b/test/e2e/yarn.e2e.spec.js
index 5e56d12..6f892a0 100644
--- a/test/e2e/yarn.e2e.spec.js
+++ b/test/e2e/yarn.e2e.spec.js
@@ -70,8 +70,9 @@ describe("E2E: yarn coverage", () => {
 
     var result = await shell.runCommand("yarn");
 
-    assert.ok(
-      result.output.includes("blocked 1 malicious package downloads"),
+    assert.match(
+      result.output,
+      /blocked \d+ malicious package downloads/,
       `Output did not include expected text. Output was:\n${result.output}`
     );
     assert.ok(